A state law legal malpractice claim involving patent disputes does not arise under federal law unless the federal issue is substantial to the federal system as a whole.
A plaintiff filed a state law legal malpractice claim against his former attorneys, alleging they failed to raise an experimental-use defense during a patent infringement suit. The question is whether such a claim arises under federal patent law to trigger exclusive federal jurisdiction under 28 U.S.C. § 1338(a). Applying the Grable test, the Court holds that while the claim necessarily raises and disputes a federal issue, that issue is not substantial to the federal system as a whole. Because the malpractice claim is backward-looking and hypothetical, it does not disrupt the federal-state balance of judicial responsibilities. Therefore, state courts retain jurisdiction over such claims.
At page 256 Defining the scope of federal court jurisdiction1,053 citing casesquoting Kokkonen v. Guardian Life Ins. Co. of Am., 511 U.S. 375, 377 (1994)
- James v. Crosby, No. 2025-3025 (D.D.C. Sept. 24, 2026).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Noha v. Hayden, No. 2025-1308 (D.D.C. Sept. 3, 2026).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Robin Garnett v. Dg Louisiana d/b/a Dollar Gen., Abc Ins. Co., & Jakoyia Miller, No. 2:25-cv-01518 (E.D. La. Oct. 27, 2025).(Federal courts are courts of limited jurisdiction,” possessing “only that power authorized by Constitution and statute.)
- Burchfield v. State Farm Ins. Co., No. 4:25-cv-01055 (E.D. Mo. July 23, 2025).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Graw v. Eli Lilly & Co., No. 4:25-cv-01033 (E.D. Mo. July 15, 2025).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Werling v. Menne, No. 4:24-cv-01635 (E.D. Mo. July 2, 2025).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Tate v. Culver & Cain Prod., No. 4:25-cv-00913 (E.D. Mo. June 25, 2025).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Brown v. Powers, No. 2:24-cv-00004, 2024 WL 4370845 (E.D. Mo. Oct. 2, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Williams-Goode v. State of Missouri, No. 4:24-cv-00539 (E.D. Mo. Sept. 30, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Little v. Walmart Claims Servs., lnc., No. 2:24-cv-00065 (E.D. Mo. Sept. 25, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
Show 214 more citing cases
- Sopkin v. Lopatto, No. 2024-0743 (D.D.C. Sept. 19, 2024).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Jamerson-Hollinshed v. Deutsche Bank Nat'l Trust, No. 4:24-cv-00658 (E.D. Mo. Sept. 6, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Moore v. Pearson, No. 4:24-cv-00480 (E.D. Mo. July 16, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Afiz v. Buckner, No. 4:24-cv-00163 (E.D. Mo. May 9, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Brown v. Powers, No. 2:24-cv-00004 (E.D. Mo. May 1, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Ordoukhanian v. Bailey, No. 4:24-cv-00550 (E.D. Mo. Apr. 22, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Davis v. Adair Cnty. Ambulance Dist., No. 2:23-cv-00022 (E.D. Mo. Mar. 28, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Ross v. Chandra, No. 4:24-cv-00146 (E.D. Mo. Mar. 4, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute.)
- Wilson v. Conklin, No. 2022-3639 (D.D.C. Feb. 23, 2024).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Brumfield v. Stand. Fire Ins. Co., No. 2:23-cv-00341 (E.D. Wash. Feb. 14, 2024).(‘Federal courts are 15 courts of limited jurisdiction,’ possessing ‘only that power authorized by 16 Constitution and statute.’)
- Guichard v. McCormack Baron Mgmt., Inc., No. 4:24-cv-00066 (E.D. Mo. Jan. 12, 2024).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Andrade v. Gen. Servs. Admin., No. 2023-0245 (D.D.C. Jan. 5, 2024).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Ford v. Bd. of Healing Arts, No. 4:23-cv-01337 (E.D. Mo. Dec. 1, 2023).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Woodford v. Yazam Inc., No. 2022-3665 (D.D.C. Nov. 21, 2023).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Sopkin v. Lopatto, No. 2022-3300, 2023 WL 5833679 (D.D.C. Sept. 8, 2023).published(�Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.)
- Freedman v. Fed. Elections Comm'n, No. 2022-1542 (D.D.C. Sept. 1, 2023).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Harry v. FBI, No. 4:23-cv-01014 (E.D. Mo. Aug. 24, 2023).(Federal courts are courts of limited jurisdiction, possessing only that power authorized by Constitution and statute)
- Whitaker v. United State of Am., No. 2022-1414 (D.D.C. Aug. 4, 2023).published(‘Federal courts are courts of limited jurisdiction,’ possessing ‘only that power authorized by Constitution and statute.’)
- Silva v. West Texas Frac Sand Logistics LLC, No. 2:24-cv-00874 (D.N.M. July 17, 2025).
- Arizona, State of v. GlaxoSmithKline LLC, No. 2:25-cv-00860 (D. Ariz. Aug. 26, 2025).
- Gray v. Hopkins, No. 3:25-cv-02375 (N.D. Tex. Sept. 9, 2025).
- Matthews, No. 3:25-cv-00046 (N.D. Tex. Sept. 30, 2025).
- Kimberly Taulton v. Keadron Robinson, No. 3:26-cv-00240 (N.D. Tex. Feb. 2, 2026).
- Webb, No. 2:26-cv-01938 (E.D. La. Sept. 15, 2026).
At page 258 Defining the special category for federal jurisdiction over state law claims773 citing cases“federal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federal-state balance approved by congress.”
- Thompson, No. 6:26-cv-00169 (E.D. Okla. Sept. 17, 2026). (federal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federal-…)
- Rodemaker, No. 7:21-cv-00020 (M.D. Ga. July 21, 2026).([F]ederal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federa…)
- Gene K. Lee Med. Corp. v. Elevance Health Inc., et al., No. 2:26-cv-06160 (C.D. Cal. July 6, 2026). Although federal question jurisdiction “[m]ost directly . . . arises under federal law when federal law creates the cause of action asserted[,]’ Gunn v. Minton, 568 U.S. 251, 257 , 133 S.Ct. 1059, 1064 (2013), there is “another longstandin…
- Gene K. Lee Med. Corp. v. Elevance Health Inc., et al., No. 2:26-cv-06151 (C.D. Cal. July 6, 2026). Although federal question jurisdiction “[mJost directly . . . arises under federal law when federal law creates the cause of action asserted[,]” Gunn v. Minton, 568 U.S. 251, 257 , 133 S.Ct. 1059, 1064 (2013), there is “another longstandin…
- Superior Fence & Constr., Inc. v. McGraw Enter., L.L.C., No. 3:25-cv-01400 (D. Or. Sept. 17, 2025). ([F]ederal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federa…)
- Donald Black v. Mantei & Assocs., Ltd., 145 F.4th 528 (4th Cir. 2025).published(Federal jurisdiction will lie only if a case meets all four [Gunn] requirements.)
- Baptist Hosp. of Miami, Inc. v. Preferred Care Network, Inc., No. 1:25-cv-22245 (S.D. Fla. July 28, 2025). (Although [state law malpractice cases] may necessarily raise disputed questions of patent law, those cases are by their nature unlikely to have the sort of significance for the federal system necessary to establish jur…)
- Kennedy III v. UnitedHealth Grp. Inc., No. 1:25-cv-00432 (S.D.N.Y. June 20, 2025). See Gunn, 568 U.S. at 264 (“It follows from the foregoing [lack of substantiality] that Grable’s fourth requirement is also not met.”); see also Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905, 916 (2d Cir. 2024), For another, the Supreme…
- SantaMaria v. Obama, No. 1:25-cv-00101 (S.D. Tex. June 18, 2025).(Tort law has historically been left to the states.)
- Andy Investments LLC v. Potter, No. 2:25-cv-00384 (W.D. Wash. Apr. 21, 2025). No. 14 at 5; see also Gunn, 568 U.S. at 260 (“The substantiality inquiry under Grable 1 looks . . . to the importance of the issue to the federal system as a whole.”); River Stone Holdings 2 NW, LLC v. Lopez, 395 P.3d 1071, 1076 (Wash. Ct.…
Show 195 more citing cases
- Biodiagnostic Labs, Inc v. CVS Health, Inc., No. 1:23-cv-09570 (E.D.N.Y June 23, 2024). See Gunn, 568 U.S. at 257 (“Most directly, a case arises under federal law when federal law creates the cause of action asserted.”).
- Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905 (2d Cir. 2024).published Accordingly, we here consider only the federal law standing issue on which it does rely. 12 See Rudolf v. Shayne, Dachs, Stanisci, Corker & Sauer, 8 N.Y.3d 438, 442 (2007) (holding that to establish causation in legal malpractice action, “…
- Silva v. West Texas Frac Sand Logistics LLC, No. 2:24-cv-00874 (D.N.M. July 17, 2025).
- Arizona, State of v. GlaxoSmithKline LLC, No. 2:25-cv-00860 (D. Ariz. Aug. 26, 2025).
- Kimberly Taulton v. Keadron Robinson, No. 3:26-cv-00240 (N.D. Tex. Feb. 2, 2026).
- Webb, No. 2:26-cv-01938 (E.D. La. Sept. 15, 2026).
- Sunvestment Energy Grp. NY 64 LLC v. Nat'l Grid USA Servs. Co., Inc., 116 F.4th 106 (2d Cir. 2024).published
- Careco, LLC v. Miguel Solorio, No. 5:24-cv-00836 (C.D. Cal. June 26, 2024).
- Micron Tech., Inc. v. Netlist, Inc., No. 1:24-cv-00001 (D. Idaho Aug. 13, 2024).
- Micron Tech., Inc. v. Netlist, Inc., No. 1:24-cv-00081 (D. Idaho Aug. 13, 2024).
- Schnupp v. Blair Pharmacy, Inc., No. 1:17-cv-02335 (D. Md. Sept. 5, 2024).
- Impex Trading Int'l, Inc. v. USVI, No. 3:21-cv-00044 (D.V.I. July 26, 2024).
- B&B Mfg., Inc. v. United States Virgin Islands, No. 3:21-cv-00052 (D.V.I. July 26, 2024).
- United Corp. v. USVI, No. 3:21-cv-00043 (D.V.I. July 26, 2024).
- Bluewater Constr., Inc. v. The United States Virgin Islands, No. 3:21-cv-00040 (D.V.I. July 26, 2024).
- Apex Constr. Co., Inc v. USVI, No. 3:21-cv-00039 (D.V.I. July 26, 2024).
- MSI Bldg. Supplies, Inc. v. The United States Virgin Islands, No. 3:21-cv-00041 (D.V.I. July 26, 2024).
- Atl. Shore Surgical Assocs., P.C. v. Cigna Health & Life Ins. Co., No. 3:23-cv-02699 (D.N.J. Dec. 27, 2024).unpublished
- Timothy Jenkins v. Howard Univ., 123 F.4th 1343 (D.C. Cir. 2024).published
- Us Health Drug Store Inc. v. Pierre Fabre USA, Inc., No. 2:24-cv-05848 (D.N.J. Dec. 6, 2024).unpublished
- Royal Canin U. S. A. v. Wullschleger, 604 U.S. 22 (2025).published
- Wilson v. Farm Credit Mid-Am., ACA, No. 3:24-cv-00061 (W.D. Ky. Mar. 12, 2025).
- AST & Sci. LLC v. Delclaux Partners SA, 143 F.4th 1249 (11th Cir. 2025).published
- Eric Johnson v. David Mazie, 144 F.4th 146 (3d Cir. 2025).published
- Levitan v. Patterson Belknap Webb & Tyler LLP, No. 1:25-cv-00393 (E.D.N.Y Sept. 30, 2025).
- Cohen, No. 2:25-cv-04561 (E.D. Pa. Oct. 30, 2025).
- Grygelko, No. 0:25-cv-03883 (D. Minn. Oct. 16, 2025).
- Apex Constr. Co Inc v. United States Virgin Islands, No. 24-2530 (3d Cir. Feb. 5, 2026).unpublished
- Agag, No. 3:25-cv-00498 (D. Conn. Apr. 15, 2026).
- Hume, No. 2:25-cv-01501 (W.D. Wash. Feb. 3, 2026).
- Rivers, No. 2:26-cv-00127 (M.D. Ala. June 24, 2026).
- West Series of Lockton Companies, LLC v. Eric Kaufman, No. 24-1072, 24-1074 (8th Cir. Aug. 26, 2026).published
- Adams, No. 2:26-cv-00050 (M.D. Ala. Sept. 23, 2026).
- Schoeps v. Sompo Holdings, Inc., 736 F. Supp. 3d 582 (N.D. Ill. 2024).published
- Eco Fiber Inc. v. Yukon Packaging, LLC, No. 3:24-cv-00484 (W.D.N.C. June 18, 2024).
- City Of New York v. Exxon Mobil Corp., 733 F. Supp. 3d 296 (S.D.N.Y. 2024).published
- Black Lives Matter D.C. v. Trump, 720 F. Supp. 3d 1 (D.D.C. 2024).published
- N.R.S.C. v. Fec, No. 24-3051 (6th Cir. Sept. 5, 2024).published
- Gardner v. Williams, No. 4:24-cv-00564 (E.D. Ark. Sept. 3, 2024).
- Justin Lovelace v. AK Futures, LLC, No. 8:24-cv-01154 (C.D. Cal. June 27, 2024).
- CP IV 8 Olive LLC v. Monica Quintanilla, No. 2:24-cv-01648 (C.D. Cal. July 1, 2024).
- Olarte v. Neale, No. 3:24-cv-02021 (N.D. Cal. Sept. 5, 2024).
- Bordelon v. Singh, No. 4:24-cv-01173 (N.D. Cal. Sept. 27, 2024).
- Howard Schleider v. GVDB Operations, LLC, 121 F.4th 149 (11th Cir. 2024).published
- State of Connecticut v. RZ Smoke, Inc., No. 3:24-cv-00190 (D. Conn. Oct. 16, 2024).
- Hoffnagle v. Connecticut Water Co., No. 3:23-cv-01489 (D. Conn. Sept. 25, 2024).
- Doe v. Effingham Health Sys. Found., Inc., No. 4:23-cv-00287 (S.D. Ga. July 17, 2024).
- Grant Twp. v. Bd. of Cnty. Commissioners of Douglas Cnty., Kansas, No. 2:24-cv-02306 (D. Kan. Oct. 28, 2024).
- Blandford v. UofL Health, Inc., No. 3:23-cv-00192 (W.D. Ky. July 1, 2024).
- St. Bernard Par. Sch. Bd. v. Bd. of Commissioners of the Port of New Orleans, No. 2:24-cv-01952 (E.D. La. Oct. 9, 2024).
- Hicks v. New Millennium Bldg. Sys., LLC, No. 0:24-cv-00164, 2024 WL 4234995 (D. Minn. Sept. 17, 2024).
- Hix v. SKS Dev. LLC, No. 1:24-cv-00175 (D.N.M. July 19, 2024).
- Jefferson v. Kramer, No. 2:24-cv-00316 (D. Nev. June 20, 2024).
- Lititz Mut. Ins. Co. v. Prikis, No. 5:24-cv-00155 (E.D. Pa. Oct. 22, 2024).
- Utah Dep't of Transp. v. Oveson, No. 2:23-cv-00789 (D. Utah July 15, 2024).
- Knudsen v. Hightower Holdings LLC, No. 2:24-cv-00395, 2024 WL 3430994 (W.D. Wash. July 16, 2024).
- Hayle v. J.B. Hunt Transp. Inc, No. 2:24-cv-00956 (W.D. Wash. Oct. 16, 2024).
- Dicasimirro v. GETMYBOAT, INC., No. 2:24-cv-05851 (E.D. Pa. Nov. 14, 2024).
- Sirius XM Radio Inc. v. Adeptus Partners LLC, No. 1:24-cv-06953 (S.D.N.Y. Nov. 19, 2024).
- B.Y.R.D. v. Middletown Bd. of Educ., No. 3:24-cv-00207 (D. Conn. Nov. 22, 2024).
- Bordelon v. Singh, No. 4:24-cv-01173 (N.D. Cal. Nov. 25, 2024).
- Town of Hempstead v. Hochul, No. 2:24-cv-08121 (E.D.N.Y Dec. 19, 2024).
- Serrano v. Goose Creek Police Dep't, No. 2:24-cv-03369 (D.S.C. Sept. 10, 2024).
- Town of Farragut v. Murphy, No. 3:24-cv-00437 (E.D. Tenn. Dec. 20, 2024).
- Cantu v. Beck Redden, No. 24-40275 (5th Cir. Dec. 23, 2024).unpublished
- Coads v. Nassau Cnty., No. 2:24-cv-08780 (E.D.N.Y Dec. 31, 2024).
- Kerr v. Ingersoll-rand Indus. U.s., Inc., No. 1:23-cv-00961 (M.D.N.C. Jan. 6, 2025).
- Matt Holman v. Knollwood Nursing Home, LLC, No. 21-14494 (11th Cir. Jan. 10, 2025).unpublished
- Kevin Lavery v. Pursuant Health, Inc., 126 F.4th 1170 (6th Cir. 2025).published
- NYU Langone Hospitals v. Aetna Health, Inc., No. 1:24-cv-04384 (S.D.N.Y. Jan. 21, 2025).
- Healthcare Just. Coalition CA Corp. v. UnitedHealth Grp. Inc., No. 2:24-cv-04715 (C.D. Cal. Jan. 27, 2025).
- VLSI Tech. LLC v. Pat. Quality Assurance, LLC, No. 3:24-cv-00213 (E.D. Va. Feb. 13, 2025).
- Nader v. Latham & Watkins, No. 2023-2520 (D.D.C. Feb. 18, 2025).published
- Jessica Reynolds v. Saddleback Valley Unified Sch. Dist., No. 8:24-cv-02016 (C.D. Cal. Feb. 20, 2025).
- BP Energy Co. v. Cox, No. 3:24-cv-02883 (N.D. Tex. Feb. 25, 2025).
- Venus Bishop v. Blue Shield of California Life & Health Ins. Co., No. 2:25-cv-01350 (C.D. Cal. Feb. 24, 2025).
- Bernahl v. Eversheds Sutherland, No. 23-3506 (9th Cir. Mar. 7, 2025).unpublished
- Scudder Avenue LLC v. Plunkett, No. 1:24-cv-12406 (D. Mass. Mar. 19, 2025).
- O'Rear v. Diaz, No. 1:24-cv-01669 (S.D.N.Y. Mar. 14, 2025).
- The State of South Dakota v. Nat'l Collegiate Athletic Ass'n, No. 4:24-cv-04189 (D.S.D. Mar. 28, 2025).
- Ppnp LLC v. Arya, No. 3:25-cv-00790 (S.D. Cal. Apr. 8, 2025).
- Friends & Health Wellness LLC v. Right On Brand Inc, No. 3:24-cv-03007 (N.D. Tex. Apr. 9, 2025).
- Podems v. Cangemi, No. 2:24-cv-04226 (E.D.N.Y Apr. 9, 2025).
- Collector's Coffee Inc. v. Debevoise & Plimpton LLP, No. 23-7156 (D.C. Cir. Apr. 10, 2025).unpublished
- Bevacqua v. Hillsboro Aero Academy, LLC, No. 3:25-cv-00237 (D. Or. Apr. 10, 2025).
- Castleman As Receiver for Eminifx, Inc. v. Interactive Brokers LLC, No. 1:25-cv-00042 (S.D.N.Y. Apr. 10, 2025).
- Nash v. A B C Ins. Inc, No. 5:24-cv-01178 (W.D. La. Mar. 25, 2025).
- Warren Peary v. DC Comics, Inc., No. 1:25-cv-00910 (S.D.N.Y. Apr. 24, 2025).
- AMTAX Holdings 227, LLC v. CohnReznick LLP, 136 F.4th 32 (2d Cir. 2025).published
- Honeywell Int'l, Inc. v. OPTO Elec. Co., Ltd., 135 F.4th 170 (4th Cir. 2025).published
- Partners All. Corp. v. Ally Bank, No. 3:24-cv-01222 (S.D. Cal. May 5, 2025).
- Rise v. Bagshaw, No. 2024-2388 (D.D.C. May 13, 2025).published
- Glover v. Elevate Prop. Mgmt., No. 8:25-cv-00208 (D. Neb. May 28, 2025).
- Henry Enter. LLC v. King Mech. Co. Inc., No. 1:25-cv-00381 (D. Md. June 3, 2025).
- City of Covington, Kentucky v. Duke Energy Kentucky, Inc., No. 3:24-cv-00076 (E.D. Ky. June 5, 2025).
- Capital Hill Dev., LLC v. Cohn, Goldberg & Deutsch, L.L.C., No. 2024-3353 (D.D.C. June 11, 2025).published
- Bigfoot Ventures, LTD v. Mark S. Knighton, No. 2:25-cv-01378 (C.D. Cal. June 18, 2025).
- Smith v. Superior Court of California Cnty. of Alameda, No. 3:24-cv-01981 (N.D. Cal. June 30, 2025).
- Stallard v. Redner's Markets, Inc., No. 5:24-cv-06647 (E.D. Pa. July 7, 2025).
- Entra Default Solutions, LLC v. United States, No. 3:25-cv-03900 (N.D. Cal. July 7, 2025).
- The Health Care Auth. for Baptist Health v. UnitedHealthcare of Alabama, Inc., No. 2:24-cv-00774 (M.D. Ala. July 8, 2025).
- Velocity Investments, LLC v. Peck, No. 1:25-cv-00438 (S.D. Ind. July 8, 2025).
- Porth v. Payward, Inc., No. 3:25-cv-01885 (N.D. Cal. July 17, 2025).
- Oneida Cnty. v. Bangstad, Kirk, No. 3:25-cv-00520 (W.D. Wis. July 21, 2025).
- Town of Salina, New York v. CWP Syracuse I LLC, No. 5:23-cv-00748 (N.D.N.Y. July 22, 2025).
- Adekson v. HH Marble Prop., LLC, No. 1:25-cv-02418 (D. Md. July 28, 2025).
- Pina v. Pina, No. 3:25-cv-00386 (S.D. Cal. Aug. 1, 2025).
- Donald v. Bank of Am., N.A., No. 2:25-cv-01901 (E.D. Pa. Aug. 5, 2025).
- GTS Sec., LLC v. CBOE Exch., Inc., No. 1:25-cv-03361 (N.D. Ill. Aug. 14, 2025).
- Greco v. O'Donnell, No. 2:25-cv-01056 (D. Nev. Aug. 26, 2025).
- White v. Zionsville Cmty. Schs., No. 1:25-cv-00561 (S.D. Ind. Sept. 5, 2025).
- Wiley v. Fleet Farm LLC, No. 0:24-cv-04135 (D. Minn. Sept. 9, 2025).
- Edwards v. Sun Country, Inc., No. 0:25-cv-02624 (D. Minn. Sept. 15, 2025).
- Roberto Modero v. Norada Equity, Inc., No. 8:25-cv-00574 (C.D. Cal. Sept. 12, 2025).
- Aaron J. West, M.D., P.A. v. Drago, No. 3:25-cv-00616 (M.D. Fla. Sept. 18, 2025).
- Devries v. Arizona Ass'n of Realtors, No. 3:25-cv-08151 (D. Ariz. Sept. 23, 2025).
- Jackson v. Herbert, No. 2:25-cv-00692 (E.D. La. Sept. 25, 2025).
- Pina v. Pina, No. 3:25-cv-00386 (S.D. Cal. Sept. 26, 2025).
- Billing, No. 2:25-cv-00442 (W.D. Wash. Oct. 15, 2025).
- Donovitz, No. 1:25-cv-00896 (D. Del. Oct. 23, 2025).
- Gonzalez v. Google Inc., No. 24-4837 (9th Cir. Nov. 6, 2025).unpublished
- Julius H. Schoeps v. Sompo Holdings, Inc., 160 F.4th 815 (7th Cir. 2025).published
- Alvarez, No. 4:25-cv-03104 (D. Neb. Nov. 17, 2025).
- Jane Girard v. Marissa Girard, No. 25-1854 (7th Cir. Nov. 25, 2025).published
- Attenello MD APC v. St. Vincent IPA Med., L.P. et al., No. 2:25-cv-08152 (C.D. Cal. Nov. 19, 2025).
- Delta Build Servs., Inc. v. E2F Homes, LLC; Francisco Orselli; Elena Orselli; Ashley Ireland; Delgado Legal, P.A., No. 2:25-cv-00995 (M.D. Fla. Dec. 17, 2025).
- Nowak, No. 2:25-cv-08611 (D.N.J. Dec. 19, 2025).
- Devillier, No. 3:20-cv-00223 (S.D. Tex. Jan. 5, 2026).
- Jesus Estrada Pelagio v. Modern Floor Specialists, et al., No. 2:25-cv-06626 (C.D. Cal. Jan. 6, 2026).
- Univ. of North Carolina Hospitals at Chapel Hill v. United Healthcare of North Carolina, Inc.; United Healthcare Ins. Co. of the River Valley; & United Healthcare Ins. Co., No. 1:25-cv-00107 (M.D.N.C. Mar. 13, 2026).
- McMillon, No. 3:25-cv-04486 (D.S.C. Mar. 4, 2026).
- Rogalski, No. 2:25-cv-05881 (E.D. Pa. Feb. 3, 2026).
- Pugh, No. 2:25-cv-00946 (M.D. Ala. Feb. 5, 2026).
- Kamineni, No. 5:26-cv-00016 (E.D. Ky. Mar. 20, 2026).
- Neal, No. 4:25-cv-00456 (N.D. Okla. Mar. 30, 2026).
- Acton Academy, a Texas Nonprofit Corp. v. Apogee Summit Colorado LLC, Tim Kennedy, an individual, & Matt Beaudreau, an individual, No. 1:25-cv-03502 (D. Colo. Apr. 8, 2026).
- Barnes, No. 2:25-cv-00283 (D. Utah Apr. 20, 2026).
- Gunter, No. 3:25-cv-00307 (D. Alaska Apr. 23, 2026).
- Asociación de Laboratorios Clínicos v. Triple-S Advantage Inc. et al., No. 3:26-cv-01013 (D.P.R. May 4, 2026).
- Tim Griffin v. OptumRx, Inc., No. 25-1165 (8th Cir. May 6, 2026).published
- Tucker, No. 2:25-cv-01613 (E.D. La. May 27, 2026).
- Lovecchio, No. 2:26-cv-00718 (E.D. La. May 28, 2026).
- See, Sell, Sold! Auctions v. Ace Prop. & Cas. Ins. Co., ET AL., No. 4:25-cv-01187 (N.D. Tex. Feb. 18, 2026).
- Cetindag, No. 1:26-cv-21964 (S.D. Fla. June 30, 2026).
- Montoya, No. 4:26-cv-00029 (D. Mont. June 23, 2026).
- Barnes, No. 9:26-cv-00053 (D. Mont. June 23, 2026).
- Broadnax, No. 1:26-cv-00050 (W.D. Tex. June 3, 2026).
- Michael Murphy, Paul Zambito, James Martin, Kale Bittner, & John Aidan Carter v. Coinbase, Inc. & Coinbase Global, Inc., No. 3:26-cv-01569 (N.D. Cal. June 22, 2026).
- UnitedHealthcare Ins. Co. v. Maui Mem'l Emergency Med. Assocs., Inc., No. 1:26-cv-00040 (D. Haw. July 7, 2026).
- Warthen, No. 1:25-cv-03491 (D. Md. July 13, 2026).
- Warthen, No. 1:25-cv-03493 (D. Md. July 13, 2026).
- Elizabeth, No. 1:26-cv-00496 (D. Md. July 13, 2026).
- Zeigler, No. 8:26-cv-01218 (D.S.C. July 31, 2026).
- Herbert, No. 4:23-cv-06242 (D.S.C. Aug. 5, 2026).
- Kachinski, No. 2:26-cv-10349 (E.D. Mich. July 23, 2026).
- Carter, No. 2:26-cv-01144 (D. Ariz. Aug. 7, 2026).
- Porras, No. 3:26-cv-01474 (N.D. Tex. Aug. 20, 2026).
- Altman Grp., Inc. v. Fed. Crop Ins. Corp., No. 2025-2193 (D.D.C. Aug. 24, 2026).published
- Benson, No. 2:23-cv-00746 (N.D. Ala. Aug. 26, 2026).
- T-Mobile US, Inc. v. Kaifi LLC, No. 25-1006 (Fed. Cir. Aug. 28, 2026).published
- Li, No. 5:25-cv-06650 (N.D. Cal. Sept. 1, 2026).
- Willis, No. 3:26-cv-00722 (N.D. Ala. Sept. 8, 2026).
- Duke Energy Carolinas, LLC v. Deborah Boggs Harwell, Lake Cruises, Inc., No. 5:25-cv-00159 (W.D.N.C. Sept. 10, 2026).
- Aljoe, No. 1:26-cv-05009 (E.D.N.Y Sept. 24, 2026).
- Wise, No. 2:26-cv-00330 (E.D. Wash. Sept. 24, 2026).
- Edmondson v. City of Boaz Alabama, No. 4:23-cv-01498 (N.D. Ala. June 24, 2024).
- Totten, No. 8:25-cv-00936 (D. Md. Oct. 24, 2025).
- Univ. of Maryland Med. Sys. Corp. v. Maryland Care, Inc., No. 1:25-cv-02319 (D. Md. Mar. 18, 2026).
- State of Texas v. Galveston Indep. Sch. Dist., Et Al., No. 3:25-cv-00378 (S.D. Tex. July 10, 2026).
- Lighthall v. Oswego City Sch. Dist., No. 5:24-cv-00283 (N.D.N.Y. Sept. 19, 2024).
- Czerner v. Smith, No. 3:23-cv-00704 (S.D.W. Va May 15, 2024).
- Tobiason v. BMO Bank NA, No. 2:24-cv-00590 (E.D. Wis. Dec. 5, 2024).
- In the Matter of: I.L., No. 1:24-cv-00403 (S.D. Ala. Nov. 14, 2024).
- FFWCT, LLC v. USA Football, Inc., No. 4:23-cv-00465 (E.D. Tex. Jan. 3, 2025).
- Wells Fargo Bank NA v. Fitzgerald, No. 2:24-cv-00835 (E.D. Wis. Feb. 11, 2025).
- Hartel v. Beazer East, Inc., No. 2:23-cv-01629 (W.D. Pa. Mar. 31, 2025).
- Labarrere v. Capital Bank, No. 1:24-cv-01152 (D.N.M. June 25, 2025).
- Bank of Am., NA v. Pub. Adm'r of Suffok Cnty. as Adm'r of the Est. of Alice G. Zahnd, No. 2:25-cv-02729 (E.D.N.Y July 14, 2025).
- Acorda Therapeutics, Inc. v. Alkermes Plc, 145 F.4th 1299 (Fed. Cir. 2025).published
- Simms Showers LLP v. Jones, No. 1:23-cv-02827 (D. Md. Sept. 24, 2025).
- Leopold, No. 5:25-cv-01079 (N.D. Ohio Nov. 14, 2025).
- Zahariev, No. 9:25-cv-02801 (D.S.C. Feb. 18, 2026).
- Micron Tech., Inc., a Delaware Corp.; & Micron Semiconductor Prods., Inc., an Idaho Corp. v. Netlist, Inc., a Delaware Corp., No. 1:25-cv-00323 (D. Idaho Mar. 25, 2026).
- Moore, No. 1:26-cv-00835 (D. Del. Sept. 16, 2026).
- Resnick, No. 1:25-cv-10333 (S.D.N.Y. Aug. 27, 2026).
- Eric Inselberg v. New York Football Giants Inc, 661 F. App'x 776 (3d Cir. 2016).unpublished“In outlining the contours of this slim category, we do not paint on a blank canvas. Unfortunately, the canvas looks like one that Jackson Pollock got to first.”
- Hilyard v. Medtronic, Inc., 21 F. Supp. 3d 1012 (E.D. Mo. 2014).published“[F]ederal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federa…”
- Dooley v. Medtronic, Inc., 39 F. Supp. 3d 973 (W.D. Tenn. 2014).published“[F]ederal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federa…”
- Arrington v. Medtronic, Inc., 130 F. Supp. 3d 1150 (W.D. Tenn. 2014).published“[Fjederal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily' raised, (2) actually disputed, "(3) substantial, and (4) capable of resolution in federal court without disrupting the fede…”
- Organic Consumers Ass'n v. Gen. Mills, Inc., 235 F. Supp. 3d 226 (D.D.C. 2017).published“[F]ederal jurisdiction over a state law claim [under 28 U.S.C. § 1331 ] will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court wit…”
- South Dakota v. Wayfair, Inc., 229 F. Supp. 3d 1026 (D.S.D. 2017).published“In outlining the contours of this slim category, we do not paint on a blank canvas. Unfortunately, the canvas looks like one that Jackson Pollock got to first.”
- Christina Brinson v. Providence Cmty. Corr., 703 F. App'x 874 (11th Cir. 2017).unpublished“[Federal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federal…”
- White v. Santa Clara Valley Water Dist., No. 5:20-cv-04242 (N.D. Cal. July 17, 2020).“That is, federal jurisdiction over a state law claim will lie if a federal issue is: 23 (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal 24 court without disrupti…”
- Intermec IP Corp. v. TransCore, LP, No. N20C-03-254 PRW CCLD, 2021 WL 3620435 (Del. Super. Ct. Aug. 16, 2021).published“Where all four of these requirements are met, . . . [federal] jurisdiction is proper. . . .”
- Blackhawk Network Inc. v. SL Card Co. Inc., No. 2:21-cv-00813 (D. Ariz. Mar. 9, 2022).“In outlining the contours of this slim category, we do not paint on 15 a blank canvas. Unfortunately, the canvas looks like one that Jackson Pollock got to first.”
At page 257 Determining federal jurisdiction under the creation test328 citing cases“most directly, a case arises under federal law when federal law creates the cause of action asserted.”
- Newlon, No. 1:25-cv-01940 (E.D. Va. May 26, 2026).([A] case arises under federal law when federal law creates the cause of action asserted.)
- Prewitt, No. 3:24-cv-00593 (W.D. Ky. Feb. 6, 2026).(A case arises under federal law when federal law creates the cause of action asserted.)
- Kevon Moore v. GoBrands, Inc., et al., No. 2:25-cv-06899 (E.D. Pa. Dec. 17, 2025).(Most directly, a case arises under federal law when federal law creates the cause of action asserted.)
- Batson v. Farmers Grp., Inc., No. 3:25-cv-00048 (W.D. Ky. May 7, 2025).(A case arises under federal law when federal law creates the cause of action asserted.)
- Brooks v. Diserens, No. 3:24-cv-01848 (S.D. Ill. Mar. 25, 2025).(No matter the source, a federal cause of action raised on the face of a complaint satisfies § 1331.)
- Ares Trading SA v. Dyax Corp, 114 F.4th 123 (3d Cir. 2024).published ([A] case arises under federal law when federal law creates the cause of action asserted.)
- Biodiagnostic Labs, Inc v. CVS Health, Inc., No. 1:23-cv-09570 (E.D.N.Y June 23, 2024). (Most directly, a case arises under federal law when federal law creates the cause of action asserted.)
- J.P. v. E. Revenue, Inc., No. 2:23-cv-10512 (C.D. Cal. Mar. 1, 2024).
- Arizona, State of v. GlaxoSmithKline LLC, No. 2:25-cv-00860 (D. Ariz. Aug. 26, 2025).
- Gray v. Hopkins, No. 3:25-cv-02375 (N.D. Tex. Sept. 9, 2025).
Show 193 more citing cases
- Matthews, No. 3:25-cv-00046 (N.D. Tex. Sept. 30, 2025).
- Kimberly Taulton v. Keadron Robinson, No. 3:26-cv-00240 (N.D. Tex. Feb. 2, 2026).
- Symbiont v. Bjm Feed, No. 1 CA-CV 21-0218 (Ariz. Ct. App. May 19, 2022).unpublished
- Francisco Negrete v. City of Oakland, 46 F.4th 811 (9th Cir. 2022).published
- PEM Entities LLC v. Cnty. of Franklin, 57 F.4th 178 (4th Cir. 2023).published
- Rothschild Connected Devices Innovations, LLC v. Coca-Cola Co., No. 23-13999 (11th Cir. Jan. 9, 2024).unpublished
- April Carroll v. Comprehensive Healthcare Mgmt. Servs. LLC, No. 22-3417 (3d Cir. Apr. 19, 2024).unpublished
- Trs. of the NYSNAPP v. White Oak Glob. Adv., No. 22-1783 (2d Cir. May 21, 2024).published
- Ghassem Azadian v. Gregory Reed, No. 8:22-cv-00268 (C.D. Cal. May 26, 2022).
- Melody J. Liddell v. Claiming any Legal or Equitable Rig, No. 8:22-cv-01000 (C.D. Cal. June 15, 2022).
- Ing. Dipl.-lng (FH) Elhar Muminovic v. Blizzard Ent., Inc., No. 8:22-cv-01669 (C.D. Cal. Nov. 9, 2022).
- Feng Zhang v. Dahua Tech., USA, Inc., No. 8:22-cv-02174 (C.D. Cal. Dec. 5, 2022).
- Alfonso Villalobos v. Knight Auto & Towing Servs. LLC, No. 8:23-cv-00823 (C.D. Cal. May 12, 2023).
- 1791 Mgmt., Lp v. Energy Vault, Inc., No. 2:23-cv-05292 (C.D. Cal. Jan. 22, 2024).
- Daniel Cavic v. Repub. of Montenegro, No. 8:23-cv-01308 (C.D. Cal. Feb. 7, 2024).
- Ameris Bank v. Tojik Trans LLC, No. 8:23-cv-02349 (C.D. Cal. May 7, 2024).
- Ameris Bank v. R & R Lucky, Inc., No. 8:24-cv-00878 (C.D. Cal. May 7, 2024).
- Ameris Bank v. Levitt Med. Aesthetics LLC, No. 8:23-cv-02329 (C.D. Cal. May 14, 2024).
- Villanueva v. Rabobank, N.A., No. 3:23-cv-00825, 2023 WL 4051996 (N.D. Cal. June 16, 2023).
- Krauss v. Rushmore Loan Mgmt. Servs. LLC, No. 3:23-cv-04511 (N.D. Cal. Dec. 8, 2023).
- Mirmalek v. Los Angeles Times Commc'ns LLC, No. 3:24-cv-01797 (N.D. Cal. May 23, 2024).
- Penkert v. Phantom Bikes, Inc., No. 3:22-cv-00305 (S.D. Cal. May 13, 2022).
- Hi-Point Home Builders, LLC v. Luman, No. 1:23-cv-00083 (D. Colo. Jan. 27, 2023).
- Shaver v. Whittier Condos. HOA, No. 1:23-cv-00645 (D. Colo. Apr. 12, 2023).
- Affinity Empowering, Inc. v. Eurofins Sci., Inc., No. 1:21-cv-01843 (D. Del. Oct. 11, 2022).
- The Williams Fam. v. Kids First of Florida, No. 3:22-cv-01099 (M.D. Fla. May 9, 2023).
- Intermax Towers, LLC v. Ada Cnty., Idaho, No. 1:23-cv-00127 (D. Idaho Jan. 11, 2024).
- Kessler v. Casey's Gen. Stores, Inc., No. 3:22-cv-02971 (S.D. Ill. Aug. 4, 2023).
- Elkins v. Se. Indiana Health Mgmt. Inc. d/b/a Columbus Reg'l Health, No. 1:23-cv-01117, 2023 WL 6567438 (S.D. Ind. Oct. 10, 2023).
- Lamarr v. Goshen Health Sys., Inc., No. 1:23-cv-01173, 2023 WL 6690582 (S.D. Ind. Oct. 12, 2023).
- Doe v. Margaret Mary Cmty. Hosp. Inc., No. 1:23-cv-01655 (S.D. Ind. Feb. 21, 2024).
- Sobel v. Cameron, No. 3:22-cv-00570 (W.D. Ky. Dec. 14, 2022).
- Napper v. Goodlett, No. 3:22-cv-00533 (W.D. Ky. Apr. 10, 2023).
- Theodent, LLC v. Sadeghpour, No. 2:22-cv-00507 (E.D. La. Aug. 5, 2022).
- Town of Westborough v. Northland TPLP LLC, No. 4:22-cv-11428 (D. Mass. Oct. 31, 2022).
- Ritrovato v. United States Postal Serv. Fed. Credit Union, No. 1:23-cv-10427 (D. Mass. Oct. 5, 2023).
- Ritrovato v. McArthur, No. 1:23-cv-10301 (D. Mass. Oct. 5, 2023).
- Alston v. Baltimore Gas & Elec. Co., No. 1:22-cv-01061, 2023 WL 1472020 (D. Md. Feb. 1, 2023).
- Risdorfer v. Ascentage Pharma Grp. Inc., No. 1:23-cv-00987 (D. Md. July 19, 2023).
- Cagle v. NHC Healthcare-Maryland Heights, LLC., No. 4:21-cv-01431, 2022 WL 2833986 (E.D. Mo. July 20, 2022).
- Harris v. SafeSport, Inc, No. 4:22-cv-01063 (E.D. Mo. Nov. 2, 2022).
- Bonan v. Fed. Deposit Ins. Corp., No. 4:23-cv-00008 (E.D. Mo. Jan. 11, 2023).
- Sahm v. Allegheny Tech. Inc., No. 4:23-cv-00200 (E.D. Mo. May 17, 2023).
- The City of St. Charles v. Union Elec. Co., No. 4:23-cv-00846 (E.D. Mo. Nov. 2, 2023).
- Cotton v. Rhine, No. 4:23-cv-00417 (E.D. Mo. Dec. 18, 2023).
- Midwest Petroleum Co. v. St Louis Cnty., No. 4:23-cv-01568 (E.D. Mo. Apr. 11, 2024).
- Davis v. Wilson, No. 4:23-cv-00037 (D. Mont. Aug. 22, 2023).
- Hutten v. Specialized Loan Servicing LLC, No. 2:23-cv-00031 (E.D.N.C. Oct. 17, 2023).
- Slocum v. Value Max Fin. Co. S-Corp., No. 5:23-cv-00694 (E.D.N.C. Feb. 12, 2024).
- Comer v. Mccaskill, No. 1:21-cv-00962 (M.D.N.C. Aug. 3, 2022).
- Starsail Adventures, LLC v. Iredell Cnty., No. 5:24-cv-00003 (W.D.N.C. Feb. 26, 2024).
- Mahoney v. Morris Cnty., No. 2:21-cv-15952 (D.N.J. Nov. 29, 2022).unpublished
- Carroll v. Hackensack Meridian Pascack Valley Med. Ctr., No. 2:21-cv-18104 (D.N.J. Mar. 18, 2024).unpublished
- Bessios v. Pueblo of Pojoaque, No. 1:22-cv-00266 (D.N.M. Apr. 23, 2024).
- IGT, a Nevada Corp. v. Acres, No. 2:22-cv-02134 (D. Nev. Sept. 25, 2023).
- Wynston Hill Capital, LLC v. Crane, No. 1:21-cv-08398 (S.D.N.Y. Sept. 16, 2022).
- Crehan v. Richardson, No. 1:21-cv-01201 (W.D.N.Y. Nov. 17, 2022).
- Doe 1 v. Starpoint Cent. Sch. Dist., No. 1:23-cv-00207 (W.D.N.Y. Apr. 10, 2023).
- Noble v. The Young Men's Christian Ass'n of Cent. Ohio, No. 2:19-cv-05094 (S.D. Ohio Aug. 16, 2022).
- Garcia v. Jones, No. 6:22-cv-00118, 2022 WL 2754853 (D. Or. July 14, 2022).
- Roeder v. Polovitch, No. 5:22-cv-01796 (E.D. Pa. July 19, 2022).
- Doe v. Reproductive Med. Assocs. of Philadelphia, P.C., No. 2:23-cv-02540 (E.D. Pa. Sept. 13, 2023).
- Hsbc Bank USA Nat'l Ass'n v. Jalon, No. 2:22-cv-04292 (E.D. Pa. Sept. 29, 2023).
- Sager v. Davison Design & Dev., Inc., No. 2:21-cv-01366 (W.D. Pa. July 20, 2022).
- Page v. Evans, No. 2024-0670, 2024 WL 3534752 (D.D.C. July 25, 2024).published
- Sunvestment Energy Grp. NY 64 LLC v. Nat'l Grid USA Servs. Co., Inc., 116 F.4th 106 (2d Cir. 2024).published
- R.N.C. v. North Carolina State Bd. of Elections, No. 24-2045 (4th Cir. Oct. 29, 2024).published
- R.N.C. v. North Carolina State Bd. of Elections, No. 24-2044 (4th Cir. Oct. 29, 2024).published
- Mitchell v. State of Texas, No. 1:21-cv-00376 (S.D. Ala. Apr. 3, 2023).
- Ameris Bank v. Tojik Trans LLC, No. 8:23-cv-02349 (C.D. Cal. June 4, 2024).
- Careco, LLC v. Miguel Solorio, No. 5:24-cv-00836 (C.D. Cal. June 26, 2024).
- Jose Estrada v. The Irvine Co., LLC, No. 8:24-cv-01209 (C.D. Cal. July 2, 2024).
- State Farm Gen. Ins. Co. v. Techtronic Indus. North Am., Inc., No. 8:23-cv-01731 (C.D. Cal. Oct. 1, 2024).
- McGann v. Gorman, No. 1:24-cv-01750 (D. Colo. July 25, 2024).
- Trump Media & Tech. Grp. Corp. v. ARC Global Investments II LLC, No. 8:24-cv-02161 (M.D. Fla. Sept. 17, 2024).
- Self v. Bomnin Motors, No. 1:24-cv-23440 (S.D. Fla. Sept. 17, 2024).
- Micron Tech., Inc. v. Netlist, Inc., No. 1:24-cv-00001 (D. Idaho Aug. 13, 2024).
- Micron Tech., Inc. v. Netlist, Inc., No. 1:24-cv-00081 (D. Idaho Aug. 13, 2024).
- Ally Bank v. Godar, No. 3:24-cv-01776 (S.D. Ill. Aug. 28, 2024).
- Doe v. S. Illinois Healthcare Enter., Inc., No. 3:23-cv-02717 (S.D. Ill. Sept. 19, 2024).
- Schnupp v. Blair Pharmacy, Inc., No. 1:17-cv-02335 (D. Md. Sept. 5, 2024).
- Infucare Rx, Inc. v. Express Scripts, Inc., No. 4:24-cv-01054 (E.D. Mo. Oct. 9, 2024).
- Divine v. Securix, LLC, No. 1:23-cv-00196 (S.D. Miss. Sept. 19, 2024).
- DeCoe v. CommScope, Inc. of North Carolina, No. 5:24-cv-00025 (W.D.N.C. Aug. 5, 2024).
- Alston-page v. State Operated Sch. Dist. for the City of Paterson, No. 2:21-cv-10409 (D.N.J. Mar. 8, 2023).unpublished
- Bounds v. 531 Stetson LLC, No. 2:23-cv-01929 (D.N.J. Apr. 24, 2024).unpublished
- AMTAX Holdings 227, LLC v. CohnReznick LLP, 736 F. Supp. 3d 169 (S.D.N.Y. 2024).published
- Baptist Mem'l HealthCare Corp. v. CIGNA Health Care of Tennessee, No. 2:23-cv-02550 (W.D. Tenn. Aug. 26, 2024).
- Gurlea v. Dudley, No. 3:22-cv-00024 (D.V.I. Mar. 30, 2023).
- Impex Trading Int'l, Inc. v. USVI, No. 3:21-cv-00044 (D.V.I. July 26, 2024).
- B&B Mfg., Inc. v. United States Virgin Islands, No. 3:21-cv-00052 (D.V.I. July 26, 2024).
- United Corp. v. USVI, No. 3:21-cv-00043 (D.V.I. July 26, 2024).
- Bluewater Constr., Inc. v. The United States Virgin Islands, No. 3:21-cv-00040 (D.V.I. July 26, 2024).
- Apex Constr. Co., Inc v. USVI, No. 3:21-cv-00039 (D.V.I. July 26, 2024).
- MSI Bldg. Supplies, Inc. v. The United States Virgin Islands, No. 3:21-cv-00041 (D.V.I. July 26, 2024).
- Atl. Shore Surgical Assocs., P.C. v. Cigna Health & Life Ins. Co., No. 3:23-cv-02699 (D.N.J. Dec. 27, 2024).unpublished
- Timothy Jenkins v. Howard Univ., 123 F.4th 1343 (D.C. Cir. 2024).published
- Us Health Drug Store Inc. v. Pierre Fabre USA, Inc., No. 2:24-cv-05848 (D.N.J. Dec. 6, 2024).unpublished
- Royal Canin U. S. A. v. Wullschleger, 604 U.S. 22 (2025).published
- Wilson v. Farm Credit Mid-Am., ACA, No. 3:24-cv-00061 (W.D. Ky. Mar. 12, 2025).
- AST & Sci. LLC v. Delclaux Partners SA, 143 F.4th 1249 (11th Cir. 2025).published
- Eric Johnson v. David Mazie, 144 F.4th 146 (3d Cir. 2025).published
- Levitan v. Patterson Belknap Webb & Tyler LLP, No. 1:25-cv-00393 (E.D.N.Y Sept. 30, 2025).
- Cohen, No. 2:25-cv-04561 (E.D. Pa. Oct. 30, 2025).
- Grygelko, No. 0:25-cv-03883 (D. Minn. Oct. 16, 2025).
- Miranda Stovall v. Jefferson Cnty. Bd. of Educ., 164 F.4th 554 (6th Cir. 2026).published
- Apex Constr. Co Inc v. United States Virgin Islands, No. 24-2530 (3d Cir. Feb. 5, 2026).unpublished
- Agag, No. 3:25-cv-00498 (D. Conn. Apr. 15, 2026).
- Hume, No. 2:25-cv-01501 (W.D. Wash. Feb. 3, 2026).
- Rivers, No. 2:26-cv-00127 (M.D. Ala. June 24, 2026).
- West Series of Lockton Companies, LLC v. Eric Kaufman, No. 24-1072, 24-1074 (8th Cir. Aug. 26, 2026).published
- Adams, No. 2:26-cv-00050 (M.D. Ala. Sept. 23, 2026).
- Edmondson v. City of Boaz Alabama, No. 4:23-cv-01498 (N.D. Ala. June 24, 2024).
- Totten, No. 8:25-cv-00936 (D. Md. Oct. 24, 2025).
- Univ. of Maryland Med. Sys. Corp. v. Maryland Care, Inc., No. 1:25-cv-02319 (D. Md. Mar. 18, 2026).
- State of Texas v. Galveston Indep. Sch. Dist., Et Al., No. 3:25-cv-00378 (S.D. Tex. July 10, 2026).
133 S. Ct. at 1064 citing Kokkonen v. Guardian Life Ins. Co. of America, 511 U.S. 375, 377 (1994) (internal quotation marks omitted)63 citing cases
- Gene K. Lee Med. Corp. v. Elevance Health Inc., et al., No. 2:26-cv-06160 (C.D. Cal. July 6, 2026). ([E]ven where a claim finds its origins in state rather than federal law . . . a special and small category of cases [exist] in which arising under jurisdiction still lies.)
- Gene K. Lee Med. Corp. v. Elevance Health Inc., et al., No. 2:26-cv-06151 (C.D. Cal. July 6, 2026). ([E]ven where a claim finds its origins in state rather than federal law . . . a special and small category of cases [exist] in which arising under jurisdiction still lies.)
- Robert Bosch, Llc v. Pylon Mfg. Corp., 719 F.3d 1305 (Fed. Cir. 2013).published
- Bell v. Sec'y of Health & Human Servs., No. 2014-1072 (D.D.C. Sept. 16, 2014).published
- NASDAQ OMX Grp., Inc. v. UBS Sec., LLC, 770 F.3d 1010 (2d Cir. 2014).published
- Evergreen Square v. Wisconsin Hous. & Econ. Dev. Auth., 776 F.3d 463 (7th Cir. 2015).published
- Hand v. Perez, No. 2014-0880, 2015 WL 3534162 (D.D.C. June 5, 2015).published
- Pueblo of Jemez v. United States, No. 13-2181 (10th Cir. July 21, 2015).published
- Becker v. Ute Indian Tribe of the Uintah, No. 13-4172 (10th Cir. Oct. 21, 2014).published
- Online Resources Corp. v. Joao Bock Transaction Sys., 808 F.3d 739 (8th Cir. 2015).published
Show 53 more citing cases
- United States v. Al Sharaf, No. 2015-0139 (D.D.C. May 2, 2016).published
- Merrill Lynch, Pierce, Fenner & Smith Inc. v. Manning, 578 U.S. 374 (2016).published
- Caul v. United States Capitol Police Bd., No. 2015-1243, 2016 WL 2962194 (D.D.C. May 19, 2016).published
- Poarch Band of Creek Indians v. James H. Hildreth, Jr., No. 15-13400 (11th Cir. July 11, 2016).unpublished
- Safe Streets All. v. Hickenlooper, 859 F.3d 865 (10th Cir. 2017).published
- In re Stand. & Poor's Rating Agency Litig., 23 F. Supp. 3d 378 (S.D.N.Y. 2014).published
- Bd. of Commissioners of Se. Louisiana Flood Prot. Auth.-East v. Tennessee Gas Pipeline Co., 29 F. Supp. 3d 808 (E.D. La. 2014).published
- Rose Acre Farms, Inc. v. North Carolina Dep't of Env't & Nat. Resources, 131 F. Supp. 3d 496 (E.D.N.C. 2015).published
- Christina Brinson v. Providence Cmty. Corr., 703 F. App'x 874 (11th Cir. 2017).unpublished
At page 260 Determining federal issue importance to the system66 citing casesemphasis added
- Kennedy III v. UnitedHealth Grp. Inc., No. 1:25-cv-00432 (S.D.N.Y. June 20, 2025). See Gunn, 568 U.S. at 264 (“It follows from the foregoing [lack of substantiality] that Grable’s fourth requirement is also not met.”); see also Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905, 916 (2d Cir. 2024), For another, the Supreme…
- Andy Investments LLC v. Potter, No. 2:25-cv-00384 (W.D. Wash. Apr. 21, 2025). (The substantiality inquiry under Grable 1 looks . . . to the importance of the issue to the federal system as a whole.)
- Bayer v. Cmty. Ins. Co., No. 2:23-cv-03876 (S.D. Ohio Apr. 18, 2024).(The substantiality inquiry under Grable looks instead to the importance of the issue to the federal system as a whole.)
- Tyngsboro Sports II Solar, LLC v. Nat'l Grid USA Serv. Co., Inc., 88 F.4th 58 (1st Cir. 2023).published(The common thread that runs through all such suits is that they entail some appreciable measure of risk to the federal sovereign.)
- Sunvestment Energy Grp. NY 64 LLC v. Nat'l Grid USA Servs. Co., Inc., 116 F.4th 106 (2d Cir. 2024).published
- Rivers, No. 2:26-cv-00127 (M.D. Ala. June 24, 2026).
- West Series of Lockton Companies, LLC v. Eric Kaufman, No. 24-1072, 24-1074 (8th Cir. Aug. 26, 2026).published
- Olarte v. Neale, No. 3:24-cv-02021 (N.D. Cal. Sept. 5, 2024).
- VLSI Tech. LLC v. Pat. Quality Assurance, LLC, No. 3:24-cv-00213 (E.D. Va. Feb. 13, 2025).
- Warren Peary v. DC Comics, Inc., No. 1:25-cv-00910 (S.D.N.Y. Apr. 24, 2025).
Show 53 more citing cases
- Wiley v. Fleet Farm LLC, No. 0:24-cv-04135 (D. Minn. Sept. 9, 2025).
- Daniel Sarauer v. Int'l Ass'n of M, 966 F.3d 661 (7th Cir. 2020).published
- Point Conversions, LLC v. Wpb Hotel Partners, LLC, 324 So. 3d 947 (Fla. 4th DCA 2021).published
- The Five Mile Creek Greenway Capital Improvement Coop. Dist. v. Corner Stone Ranch, Inc., No. 2:20-cv-01037 (N.D. Ala. May 6, 2021).
- Aetna Inc. v. Gilead Sciences, Inc., No. 3:22-cv-00740 (N.D. Cal. Apr. 20, 2022).
- Atrisco Heritage Found. v. New Mexico Comm'n for Cmty. Volunteerism, No. 1:18-cv-00937 (D.N.M. Mar. 30, 2020).
- Kohn v. Glenmede Trust Co., No. 1:19-cv-01352 (N.D. Ohio May 1, 2020).
- State of Texas v. Galveston Indep. Sch. Dist., Et Al., No. 3:25-cv-00378 (S.D. Tex. July 10, 2026).
- Lighthall v. Oswego City Sch. Dist., No. 5:24-cv-00283 (N.D.N.Y. Sept. 19, 2024).
At page 259 Determining causation in legal malpractice claims involving patent law40 citing casesTo prevail on his legal malpractice claim … Minton must show that he would have prevailed in his federal patent infringe‐ ment case
- Ares Trading SA v. Dyax Corp, 114 F.4th 123 (3d Cir. 2024).published Cf. Gunn, 568 U.S. at 257 (“[A] case arises under federal law when federal law creates the cause of action asserted.”).
- Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905 (2d Cir. 2024).published (In cases like this one, in which the attorney’s alleged error came in failing to make a particular argument, the causation element requires a ‘case within a case’ analysis of whether, had the argument been made, the ou…)
- Arizona, State of v. GlaxoSmithKline LLC, No. 2:25-cv-00860 (D. Ariz. Aug. 26, 2025).
- Francisco Negrete v. City of Oakland, 46 F.4th 811 (9th Cir. 2022).published
- Miranda Stovall v. Jefferson Cnty. Bd. of Educ., 164 F.4th 554 (6th Cir. 2026).published
- UnitedHealthcare Ins. Co. v. Maui Mem'l Emergency Med. Assocs., Inc., No. 1:26-cv-00040 (D. Haw. July 7, 2026).
- Jeffrey Fried v. Donna Parham Sanders, No. 18-2385 (6th Cir. Aug. 14, 2019).unpublished
- City of Oakland v. Bp P.L.C., 969 F.3d 895 (9th Cir. 2020).published
- Daniel Sarauer v. Int'l Ass'n of M, 966 F.3d 661 (7th Cir. 2020).published
- City of Oakland v. Bp P.L.C., No. 18-16663 (9th Cir. Aug. 12, 2020).published
Show 28 more citing cases
- Point Conversions, LLC v. Wpb Hotel Partners, LLC, 324 So. 3d 947 (Fla. 4th DCA 2021).published
- Chandler v. Phoenix Servs. LLC, 1 F.4th 1013 (Fed. Cir. 2021).published
- Langford v. Richardson, No. 2:19-cv-00953 (N.D. Ala. Mar. 13, 2020).
- Consulate Gen. of India in New York v. 834 5th Avenue Corp., No. 1:24-cv-09913 (S.D.N.Y. July 25, 2025).
- Lighthall v. Oswego City Sch. Dist., No. 5:24-cv-00283 (N.D.N.Y. Sept. 19, 2024).
133 S. Ct. at 1065 [F]ederal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federal-state balance approved by Congress.32 citing cases
- NASDAQ OMX Grp., Inc. v. UBS Sec., LLC, 770 F.3d 1010 (2d Cir. 2014).published
- Merrill Lynch, Pierce, Fenner & Smith Inc. v. Manning, 578 U.S. 374 (2016).published
- Safe Streets All. v. Hickenlooper, 859 F.3d 865 (10th Cir. 2017).published
- In re Stand. & Poor's Rating Agency Litig., 23 F. Supp. 3d 378 (S.D.N.Y. 2014).published
- Rose Acre Farms, Inc. v. North Carolina Dep't of Env't & Nat. Resources, 131 F. Supp. 3d 496 (E.D.N.C. 2015).published
- Forrester Env't Servs., Inc. v. Wheelabrator Tech., Inc., 715 F.3d 1329 (Fed. Cir. 2013).published
- Mun. of Mayaguez v. Corporacion Para El Desarrollo Del Oeste, Inc., 726 F.3d 8 (1st Cir. 2013).published
- Millepede Mktg. Ltd. v. Harsley, 928 F. Supp. 2d 109 (D.D.C. 2013).published
- Neurorepair, Inc. v. Nath Law Grp., 781 F.3d 1340 (Fed. Cir. 2015).published
- State of New York Ex Rel. Jacobson v. Wells Fargo Nat'l Bank, N.A., 824 F.3d 308 (2d Cir. 2016).published
Show 22 more citing cases
- Judith Goldman v. Citigroup Global Markets Inc, 834 F.3d 242 (3d Cir. 2016).published
- Henry S. Miller Commerial Co. v. Newsom, Terry & Newsom, LLP, No. 05-14-01188-CV (Tex. App.—Dallas Sept. 14, 2016).published
- Lakshmi Arunachalam v. George Pazuniak, No. 16-3663 (3d Cir. Oct. 13, 2016).unpublished
- Apton v. Volkswagen Grp. of Am., Inc., 233 F. Supp. 3d 4 (D.D.C. 2017).published
- Peters v. Alaska Tr., LLC, 305 F. Supp. 3d 1019 (D. Alaska 2018).published
- Haith ex rel. Accretive Health, Inc. v. Bronfman, 928 F. Supp. 2d 964 (N.D. Ill. 2013).published
- Christina Brinson v. Providence Cmty. Corr., 703 F. App'x 874 (11th Cir. 2017).unpublished
At page 261 Determining substantial federal interest in state claims29 citing casescitations omitted
- Micron Tech., Inc. v. Netlist, Inc., No. 1:24-cv-00001 (D. Idaho Aug. 13, 2024).
- Micron Tech., Inc. v. Netlist, Inc., No. 1:24-cv-00081 (D. Idaho Aug. 13, 2024).
- Gurlea v. Dudley, No. 3:22-cv-00024 (D.V.I. Mar. 30, 2023).
- AST & Sci. LLC v. Delclaux Partners SA, 143 F.4th 1249 (11th Cir. 2025).published
- Rivers, No. 2:26-cv-00127 (M.D. Ala. June 24, 2026).
- Nader v. Latham & Watkins, No. 2023-2520 (D.D.C. Feb. 18, 2025).published
- Scudder Avenue LLC v. Plunkett, No. 1:24-cv-12406 (D. Mass. Mar. 19, 2025).
- T-Mobile US, Inc. v. Kaifi LLC, No. 25-1006 (Fed. Cir. Aug. 28, 2026).published
- Willis, No. 3:26-cv-00722 (N.D. Ala. Sept. 8, 2026).
- Chandler v. Phoenix Servs. LLC, 1 F.4th 1013 (Fed. Cir. 2021).published
Show 19 more citing cases
- Aetna Inc. v. Gilead Sciences, Inc., No. 3:22-cv-00740 (N.D. Cal. Apr. 20, 2022).
- Inspired Dev. Grp. v. Inspired Prods. Grp., LLC, 938 F.3d 1355 (Fed. Cir. 2019).published
- Fed. Trade Comm'n v. AbbVie Inc, 976 F.3d 327 (3d Cir. 2020).published
- Antennasys, Inc. v. Aqyr Tech., Inc., 976 F.3d 1374 (Fed. Cir. 2020).published
- Warsaw Orthopedic, Inc., Medtronic, Inc., & Medtronic Sofamor Danek, Inc. v. Rick C. Sasso, M.D. (mem. dec.), 162 N.E.3d 1 (Ind. Ct. App. 2020).published
- Dagostine v. Pendleton, No. 2:22-cv-00220, 2022 WL 16950281 (S.D.W. Va Nov. 15, 2022).
- Micron Tech., Inc., a Delaware Corp.; & Micron Semiconductor Prods., Inc., an Idaho Corp. v. Netlist, Inc., a Delaware Corp., No. 1:25-cv-00323 (D. Idaho Mar. 25, 2026).
At page 264 Balancing federal and state judicial responsibilities in jurisdiction25 citing casescitation omitted
- Kennedy III v. UnitedHealth Grp. Inc., No. 1:25-cv-00432 (S.D.N.Y. June 20, 2025). (It follows from the foregoing [lack of substantiality] that Grable’s fourth requirement is also not met.)
- Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905 (2d Cir. 2024).published Accordingly, we here consider only the federal law standing issue on which it does rely. 12 See Rudolf v. Shayne, Dachs, Stanisci, Corker & Sauer, 8 N.Y.3d 438, 442 (2007) (holding that to establish causation in legal malpractice action, “…
- Crehan v. Richardson, No. 1:21-cv-01201 (W.D.N.Y. Nov. 17, 2022).
- Doe 1 v. Starpoint Cent. Sch. Dist., No. 1:23-cv-00207 (W.D.N.Y. Apr. 10, 2023).
- Collector's Coffee Inc. v. Debevoise & Plimpton LLP, No. 23-7156 (D.C. Cir. Apr. 10, 2025).unpublished
- Warren Peary v. DC Comics, Inc., No. 1:25-cv-00910 (S.D.N.Y. Apr. 24, 2025).
- Wiley v. Fleet Farm LLC, No. 0:24-cv-04135 (D. Minn. Sept. 9, 2025).
- Li, No. 5:25-cv-06650 (N.D. Cal. Sept. 1, 2026).
- Langford v. Richardson, No. 2:19-cv-00953 (N.D. Ala. Mar. 13, 2020).
- Consulate Gen. of India in New York v. 834 5th Avenue Corp., No. 1:24-cv-09913 (S.D.N.Y. July 25, 2025).
Show 15 more citing cases
- The Five Mile Creek Greenway Capital Improvement Coop. Dist. v. Corner Stone Ranch, Inc., No. 2:20-cv-01037 (N.D. Ala. May 6, 2021).
- Inspired Dev. Grp. v. Inspired Prods. Grp., LLC, 938 F.3d 1355 (Fed. Cir. 2019).published
- Fischer v. Fischer, No. 3:20-cv-02173 (N.D. Tex. Apr. 30, 2021).
- Sauk-suiattle Indian Tribe v. City of Seattle, 56 F.4th 1179 (9th Cir. 2022).published
- Leopold, No. 5:25-cv-01079 (N.D. Ohio Nov. 14, 2025).
- Micron Tech., Inc., a Delaware Corp.; & Micron Semiconductor Prods., Inc., an Idaho Corp. v. Netlist, Inc., a Delaware Corp., No. 1:25-cv-00323 (D. Idaho Mar. 25, 2026).
133 S. Ct. at 1068 But the possibility that a state court will incorrectly resolve a state claim is not, by itself, enough to trigger the federal courts’ exclusive patent jurisdiction, even if- the potential error finds its root in a misunderstanding of patent law.20 citing cases
- NASDAQ OMX Grp., Inc. v. UBS Sec., LLC, 770 F.3d 1010 (2d Cir. 2014).published
- In re Stand. & Poor's Rating Agency Litig., 23 F. Supp. 3d 378 (S.D.N.Y. 2014).published
- Millepede Mktg. Ltd. v. Harsley, 928 F. Supp. 2d 109 (D.D.C. 2013).published
- Peters v. Alaska Tr., LLC, 305 F. Supp. 3d 1019 (D. Alaska 2018).published
- Maling v. Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, 42 N.E.3d 199 (Mass. 2015).published
- Arnold & Itkin, L.L.P., Beck Redden LLP, Albritton Law Firm, Kurt Arnold, Cory Itkin, Jason Itkin, Russell Post, Fields Alexander, Jas Brar & Eric Albritton v. Maria Santos Lopez Dominguez, Individually & as Next Friend of Karen Marien Andrade Lopez, No. 01-15-00989-CV (Tex. App.—Houston [1st Dist.] Dec. 3, 2015).published
- Hardy v. Medtronic, Inc., 41 F. Supp. 3d 571 (W.D. Ky. 2014).published
- Padgett v. Medtronic, Inc., 41 F. Supp. 3d 582 (W.D. Ky. 2014).published
- Roden v. Medtronic, Inc., 41 F. Supp. 3d 593 (W.D. Ky. 2014).published
- Goffner v. Medtronic, Inc., 41 F. Supp. 3d 604 (W.D. Ky. 2014).published
Show 10 more citing cases
- Hubbard v. Medtronic, Inc., 41 F. Supp. 3d 614 (W.D. Ky. 2014).published
- Shelton v. Medtronic, Inc., 41 F. Supp. 3d 622 (W.D. Ky. 2014).published
- Beavers v. Medtronic, Inc., 41 F. Supp. 3d 633 (W.D. Ky. 2014).published
- Miller v. Medtronic, Inc., 41 F. Supp. 3d 644 (W.D. Ky. 2014).published
At page 263 Determining federal jurisdiction over state malpractice claims19 citing casescitation omitted
- Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905 (2d Cir. 2024).published Accordingly, we here consider only the federal law standing issue on which it does rely. 12 See Rudolf v. Shayne, Dachs, Stanisci, Corker & Sauer, 8 N.Y.3d 438, 442 (2007) (holding that to establish causation in legal malpractice action, “…
- Force MOS Tech. Co., Ltd. v. Lin, No. 5:22-cv-08938 (N.D. Cal. Mar. 19, 2024). (But even assuming that a [malpractice action’s] 8 case-within-a-case adjudication may be preclusive under some circumstances, the result would be 9 limited to the parties . . . that had been before the . . . court.)
- Symbiont v. Bjm Feed, No. 1 CA-CV 21-0218 (Ariz. Ct. App. May 19, 2022).unpublished
- 1791 Mgmt., Lp v. Energy Vault, Inc., No. 2:23-cv-05292 (C.D. Cal. Jan. 22, 2024).
- Sunvestment Energy Grp. NY 64 LLC v. Nat'l Grid USA Servs. Co., Inc., 116 F.4th 106 (2d Cir. 2024).published
- AMTAX Holdings 227, LLC v. CohnReznick LLP, 736 F. Supp. 3d 169 (S.D.N.Y. 2024).published
- Town of Hempstead v. Hochul, No. 2:24-cv-08121 (E.D.N.Y Dec. 19, 2024).
- Scudder Avenue LLC v. Plunkett, No. 1:24-cv-12406 (D. Mass. Mar. 19, 2025).
- AMTAX Holdings 227, LLC v. CohnReznick LLP, 136 F.4th 32 (2d Cir. 2025).published
- Chandler v. Phoenix Servs. LLC, 1 F.4th 1013 (Fed. Cir. 2021).published
Show 9 more citing cases
- Kohn v. Glenmede Trust Co., No. 1:19-cv-01352 (N.D. Ohio May 1, 2020).
- Dagostine v. Pendleton, No. 2:22-cv-00220, 2022 WL 16950281 (S.D.W. Va Nov. 15, 2022).
- Fischer v. Fischer, No. 3:20-cv-02173 (N.D. Tex. Apr. 30, 2021).
- Adams v. Max Credit Union, No. 3:23-cv-00316 (M.D. Ala. Oct. 3, 2023).
- Leopold, No. 5:25-cv-01079 (N.D. Ohio Nov. 14, 2025).
133 S. Ct. at 1066 emphasis added15 citing cases
- NASDAQ OMX Grp., Inc. v. UBS Sec., LLC, 770 F.3d 1010 (2d Cir. 2014).published
- Bd. of Commissioners of Se. Louisiana Flood Prot. Auth.-East v. Tennessee Gas Pipeline Co., 29 F. Supp. 3d 808 (E.D. La. 2014).published
- Mun. of Mayaguez v. Corporacion Para El Desarrollo Del Oeste, Inc., 726 F.3d 8 (1st Cir. 2013).published
- Millepede Mktg. Ltd. v. Harsley, 928 F. Supp. 2d 109 (D.D.C. 2013).published
- Neurorepair, Inc. v. Nath Law Grp., 781 F.3d 1340 (Fed. Cir. 2015).published
- State of New York Ex Rel. Jacobson v. Wells Fargo Nat'l Bank, N.A., 824 F.3d 308 (2d Cir. 2016).published
- Haith ex rel. Accretive Health, Inc. v. Bronfman, 928 F. Supp. 2d 964 (N.D. Ill. 2013).published
- MDS (Canada) Inc. v. Rad Source Tech., Inc., 720 F.3d 833 (11th Cir. 2013).published
- Solar Dynamics, Inc. v. Buchanan Ingersoll & Rooney, P.C., 211 So. 3d 294 (Fla. 2d DCA 2017).published
- Bd. of Commissioners v. Tennessee Gas Pipeline Co., 850 F.3d 714 (5th Cir. 2017).published
Show 4 more citing cases
- Dominion Pathology Labs., P.C. v. Anthem Health Plans of Virginia, Inc., 111 F. Supp. 3d 731 (E.D. Va. 2015).published
- Bollea v. Clem, 937 F. Supp. 2d 1344 (M.D. Fla. 2013).published
- Bonnie Reyes v. Mars, Inc., No. 2:24-cv-00035 (C.D. Cal. Jan. 31, 2024).
- J.P. v. E. Revenue, Inc., No. 2:23-cv-10512 (C.D. Cal. Mar. 1, 2024).
At page 262 Federal courts' deference to state case-within-a-case patent rulings13 citing casescitation omitted
- Kennedy III v. UnitedHealth Grp. Inc., No. 1:25-cv-00432 (S.D.N.Y. June 20, 2025). See Gunn, 568 U.S. at 264 (“It follows from the foregoing [lack of substantiality] that Grable’s fourth requirement is also not met.”); see also Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905, 916 (2d Cir. 2024), For another, the Supreme…
- Link Motion Inc. v. DLA Piper LLP, 103 F.4th 905 (2d Cir. 2024).published Accordingly, we here consider only the federal law standing issue on which it does rely. 12 See Rudolf v. Shayne, Dachs, Stanisci, Corker & Sauer, 8 N.Y.3d 438, 442 (2007) (holding that to establish causation in legal malpractice action, “…
- Symbiont v. Bjm Feed, No. 1 CA-CV 21-0218 (Ariz. Ct. App. May 19, 2022).unpublished
- Warren Peary v. DC Comics, Inc., No. 1:25-cv-00910 (S.D.N.Y. Apr. 24, 2025).
- Chandler v. Phoenix Servs. LLC, 1 F.4th 1013 (Fed. Cir. 2021).published
- Atrisco Heritage Found. v. New Mexico Comm'n for Cmty. Volunteerism, No. 1:18-cv-00937 (D.N.M. Mar. 30, 2020).
- Warsaw Orthopedic, Inc., Medtronic, Inc., & Medtronic Sofamor Danek, Inc. v. Rick C. Sasso, M.D. (mem. dec.), 162 N.E.3d 1 (Ind. Ct. App. 2020).published
- Damaso v. Costco Wholesale Corp., No. 2:19-cv-00574, 2019 U.S. Dist. LEXIS 182453 (M.D. Fla. Oct. 22, 2019).
- Ragner Tech. Corp. v. Berardi, No. 9:20-cv-80020, 2020 WL 1244863 (S.D. Fla. Mar. 16, 2020).
- Fischer v. Fischer, No. 3:20-cv-02173 (N.D. Tex. Apr. 30, 2021).
Show 3 more citing cases
- DRIT LP v. Glaxo Grp. Ltd., No. 1:21-cv-00844 (D. Del. Feb. 18, 2022).
- Century Next Bank v. JPMorgan Chase Bank, et al., No. 4:25-cv-02461 (S.D. Tex. Jan. 23, 2026).
- Adam Gaff v. Indiana-Purdue Univ. of Fort Wayne, 51 N.E.3d 1163 (Ind. 2016).published“State courts adjudicating civil RICO claims will ... be guided by federal court interpretations of the relevant federal criminal statutes, just as federal courts sitting in diversity are guided by state court interpret…”
133 S. Ct. at 1067 internal citations and quotation marks omitted8 citing cases
- NASDAQ OMX Grp., Inc. v. UBS Sec., LLC, 770 F.3d 1010 (2d Cir. 2014).published
- Bd. of Commissioners of Se. Louisiana Flood Prot. Auth.-East v. Tennessee Gas Pipeline Co., 29 F. Supp. 3d 808 (E.D. La. 2014).published
- Mun. of Mayaguez v. Corporacion Para El Desarrollo Del Oeste, Inc., 726 F.3d 8 (1st Cir. 2013).published
- State of New York Ex Rel. Jacobson v. Wells Fargo Nat'l Bank, N.A., 824 F.3d 308 (2d Cir. 2016).published
- Haith ex rel. Accretive Health, Inc. v. Bronfman, 928 F. Supp. 2d 964 (N.D. Ill. 2013).published
- Solar Dynamics, Inc. v. Buchanan Ingersoll & Rooney, P.C., 211 So. 3d 294 (Fla. 2d DCA 2017).published
- Eric Sanders v. Harold Flanders, No. 13-50235 (5th Cir. Apr. 22, 2014).unpublished
- Sanders v. Flanders, 564 F. App'x 742 (4th Cir. 2014).unpublished
At page 253 characterizing a legal malpractice claim as a state-law claim4 citing cases
- Chandler v. Phoenix Servs., 45 F.4th 807 (5th Cir. 2022).published
- Bland v. Sawyers, No. 2:24-cv-04015 (S.D. Ohio Oct. 10, 2024).
- Randolph v. Bath & Body Works, Inc., No. 2:25-cv-00284 (S.D. Ohio Apr. 23, 2025).
- Inhold, LLC v. Pureshield, Inc., 2021 NCBC 2 (N.C. Bus. Ct. 2021).published
At page 251 quoting Kokkonen v. Guardian Life Ins. Co. of Am., 511 U.S. 375, 377 (1994)3 citing cases
- Jamerson (ID 74123) v. Heimgartner, No. 5:17-cv-03205 (D. Kan. Apr. 21, 2020).
- Lilles v. J.C. Tenorio Enter., Inc., No. 1:22-cv-00017 (N. Mar. I. June 28, 2024).
- The Barnes Firm, P.C. v. Goldstein Greco, P.C., No. 1:23-cv-00965 (W.D.N.Y. July 30, 2024).
Other citing cases
- Rayborn v. Jackson Cnty. Sch. Dist., No. 1:23-cv-00120 (S.D. Miss. Nov. 9, 2023).
v.
MINTON
delivered the opinion of the Court.
Federal courts have exclusive jurisdiction over cases “arising under any Act of Congress relating to patents.” 28 U. S. C. § 1338(a). The question presented is whether a state law claim alleging legal malpractice in the handling of a patent case must be brought in federal court.
I
In the early 1990⅛, respondent Vernon Minton developed a computer program and telecommunications network designed to facilitate securities trading. In March 1995, he leased the system—known as the Texas Computer Exchange Network, or TEXCEN—to R. M. Stark & Co., a securities brokerage. A little over a year later, he applied for a patent for an interactive securities trading system that was based[*254] substantially on TEXCEN. The U. S. Patent and Trademark Office issued the patent in January 2000.
Patent in hand, Minton filed a patent infringement suit in Federal District Court against the National Association of Securities Dealers, Inc. (NASD), and the NASDAQ Stock Market, Inc. He was represented by Jerry Gunn and the other petitioners. NASD and NASDAQ moved for summary judgment on the ground that Minton’s patent was invalid under the “on sale” bar, 35 U. S. C. § 102(b). That provision specifies that an inventor is not entitled to a patent if “the invention was ... on sale in [the United States], more than one year prior to the date of the application,” and Min-ton had leased TEXCEN to Stark more than one year prior to filing his patent application. Rejecting Minton’s argument that there were differences between TEXCEN and the patented system that precluded application of the on-sale bar, the District Court granted the summary judgment motion and declared Minton’s patent invalid. Minton v. National Assn. of Securities Dealers, Inc., 226 F. Supp. 2d 845, 873, 883-884 (ED Tex. 2002).
Minton then filed a motion for reconsideration in the District Court, arguing for the first time that the lease agreement with Stark was part of ongoing testing of TEXCEN and therefore fell within the “experimental use” exception to the on-sale bar. See generally Pfaff v. Wells Electronics, Inc., 525 U. S. 55, 64 (1998) (describing the exception). The District Court denied the motion. Minton v. National Assn. of Securities Dealers, Inc., No. 9:00-cv-00019 (ED Tex., July 15, 2002).
Minton appealed to the U. S. Court of Appeals for the Federal Circuit. That court affirmed, concluding that the District Court had appropriately held Minton’s experimental-use argument waived. See Minton v. National Assn. of Securities Dealers, Inc., 336 F. 3d 1373, 1379-1380 (CA Fed. 2003).
[*255] Minton, convinced that his attorneys’ failure to raise the experimental-use argument earlier had cost him the lawsuit and led to invalidation of his patent, brought this malpractice action in Texas state court. His former lawyers defended on the ground that the lease to Stark was not, in fact, for an experimental use, and that therefore Minton’s patent infringement claims would have failed even if the experimental-use argument had been timely raised. The trial court agreed, holding that Minton had put forward “less than a scintilla of proof” that the lease had been for an experimental purpose. App. 213. It accordingly granted summary judgment to Gunn and the other lawyer defendants.
On appeal, Minton raised a new argument: Because his legal malpractice claim was based on an alleged error in a patent case, it “arisjes] under” federal patent law for purposes of 28 U. S. C. § 1338(a). And because, under § 1338(a), “[n]o State court shall have jurisdiction over any claim for relief arising under any Act of Congress relating to patents,” the Texas court—where Minton had originally brought his malpractice claim—lacked subject matter jurisdiction to decide the case. Accordingly, Minton argued, the trial court’s order should be vacated and the case dismissed, leaving Min-ton free to start over in the Federal District Court.
A divided panel of the Court of Appeals of Texas rejected Minton’s argument. Applying the test we articulated in Grable & Sons Metal Products, Inc. v. Darue Engineering & Mfg., 545 U. S. 308, 314 (2005), it held that the federal interests implicated by Minton’s state law claim were not sufficiently substantial to trigger § 1338 “arising under” jurisdiction. It also held that finding exclusive federal jurisdiction over state legal malpractice actions would, contrary to Grable’s commands, disturb the balance of federal and state judicial responsibilities. Proceeding to the merits of Minton’s malpractice claim, the Court of Appeals affirmed the trial court’s determination that Minton had failed to establish ex[*256] perimental use and that arguments on that ground therefore would not have saved his infringement suit.
The Supreme Court of Texas reversed, relying heavily on a pair of cases from the U. S. Court of Appeals for the Federal Circuit. 355 S. W. 3d 634, 641-642 (2011) (discussing Air Measurement Technologies, Inc. v. Akin Gump Strauss Hauer & Feld, L. L. P., 504 F. 3d 1262 (2007); Immunocept, LLC v. Fulbright & Jaworski, LLP, 504 F. 3d 1281 (2007)). The court concluded that Minton’s claim involved “a substantial federal issue” within the meaning of Grable “because the success of Minton’s malpractice claim is reliant upon the viability of the experimental use exception as a defense to the on-sale bar.” 355 S. W. 3d, at 644. Adjudication of Min-ton’s claim in federal court was consistent with the appropriate balance between federal and state judicial responsibilities, it held, because “the federal government and patent litigants have an interest in the uniform application of patent law by courts well-versed in that subject matter.” Id., at 646 (citing Immunocept, supra, at 1285-1286; Air Measurement Technologies, supra, at 1272).
Justice Guzman, joined by Justices Medina and Willett, dissented. The dissenting justices would have held that the federal issue was neither substantial nor disputed, and that maintaining the proper balance of responsibility between state and federal courts precluded relegating state legal malpractice claims to federal court.
We granted certiorari. Post, p. 936.
II
“Federal courts are courts of limited jurisdiction, possessing “only that power authorized by Constitution and statute.” Kokkonen v. Guardian Life Ins. Co. of America, 511 U. S. 375, 377 (1994). There is no dispute that the Constitution permits Congress to extend federal court jurisdiction to a case such as this one, see Osborn v. Bank of United States, 9 Wheat. 738, 823-824 (1824); the question is whether Con[*257] gress has done so, see Powell v. McCormack, 395 U. S. 486, 515-516 (1969).
As relevant here, Congress has authorized the federal district courts to exercise original jurisdiction in “all civil actions arising under the Constitution, laws, or treaties of the United States,” 28 U. S. C. § 1331, and, more particularly, over “any civil action arising under any Act of Congress relating to patents,” § 1338(a). Adhering to the demands of “[linguistic consistency,” we have interpreted the phrase “arising under” in both sections identically, applying our § 1331 and § 1338(a) precedents interchangeably. See Christianson v. Colt Industries Operating Corp., 486 U. S. 800, 808-809 (1988). For cases falling within the patent specific arising under jurisdiction of § 1338(a), however, Congress has not only provided for federal jurisdiction but also eliminated state jurisdiction, decreeing that “[n]o State court shall have jurisdiction over any claim for relief arising under any Act of Congress relating to patents.” § 1338(a). To determine whether jurisdiction was proper in the Texas courts, therefore, we must determine whether it would have been proper in a federal district court—whether, that is, the case “aris[es] under any Act of Congress relating to patents.”
For statutory purposes, a case can “aris[e] under” federal law in two ways. Most directly, a case arises under federal law when federal law creates the cause of action asserted. See American Well Works Co. v. Layne & Bowler Co., 241 U. S. 257, 260 (1916) (“A suit arises under the law that creates the cause of action”). As a rule of inclusion, this “creation” test admits of only extremely rare exceptions, see, e. g., Shoshone Mining Co. v. Rutter, 177 U. S. 505 (1900), and accounts for the vast bulk of suits that arise under federal law, see Franchise Tax Bd. of Cal. v. Construction Laborers Vacation Trust for Southern Cal., 463 U. S. 1, 9 (1983). Minton’s original patent infringement suit against NASD and NASDAQ, for example, arose under federal law in this manner because it was authorized by 35 U. S. C. §§271, 281.
[*258] But even where a claim finds its origins in state rather than federal law—as Minton’s legal malpractice claim indisputably does—we have identified a “special and small category” of cases in which arising under jurisdiction still lies. Empire HealthChoice Assurance, Inc. v. McVeigh, 547 U. S. 677, 699 (2006). In outlining the contours of this slim category, we do not paint on a blank canvas. Unfortunately, the canvas looks like one that Jaekson Pollock got to first. See 13D C. Wright, A. Miller, E. Cooper, & R. Freer, Federal Practice and Procedure § 3562, pp. 175-176 (3d ed. 2008) (reviewing general confusion on question).
In an effort to bring some order to this unruly doctrine several Terms ago, we condensed our prior cases into the following inquiry: Does the “state-law claim necessarily raise a stated federal issue, actually disputed and substantial, which a federal forum may entertain without disturbing any congressionally approved balance of federal and state judicial responsibilities?” Grable, 545 U. S., at 314. That is, federal jurisdiction over a state law claim will lie if a federal issue is: (1) necessarily raised, (2) actually disputed, (3) substantial, and (4) capable of resolution in federal court without disrupting the federal-state balance approved by Congress. Where all four of these requirements are met, we held, jurisdiction is proper because there is a “serious federal interest in claiming the advantages thought to be inherent in a federal forum,” which can be vindicated without disrupting Congress’s intended division of labor between state and federal courts. Id., at 313-314.
I—I HH h-H
Applying Grable’s inquiry here, it is clear that Mintons legal malpractice claim does not arise under federal patent law. Indeed, for the reasons we discuss, we are comfortable concluding that state legal malpractice claims based on underlying patent matters will rarely, if ever, arise under .federal patent law for purposes of § 1338(a). Although such[*259] eases may necessarily raise disputed questions of patent law, those cases are by their nature unlikely to have the sort of significance for the federal system necessary to establish jurisdiction.
A
To begin, we acknowledge that resolution of a federal patent question is “necessary” to Minton’s case. Under Texas law, a plaintiff alleging legal malpractice must establish four elements: (1) that the defendant attorney owed the plaintiff a duty; (2) that the attorney breached that duty; (3) that the breach was the proximate cause of the plaintiffs injury; and (4) that damages occurred. See Alexander v. Turtur & Associates, Inc., 146 S. W. 3d 113, 117 (Tex. 2004). In cases like this one, in which the attorney’s alleged error came in failing to make a particular argument, the causation element requires a “case within a ease” analysis of whether, had the argument been made, the outcome of the earlier litigation would have been different. 355 S. W. 3d, at 639; see 4 R. Mallen & J. Smith, Legal Malpractice §37:15, pp. 1509-1520 (2012). To prevail on his legal malpractice claim, therefore, Minton must show that he would have prevailed in his federal patent infringement case if only petitioners had timely made an experimental-use argument on his behalf. 355 S. W. 3d, at 644. That will necessarily require application of patent law to the facts of Minton’s case.
B
The federal issue is also “actually disputed” here—indeed, on the merits, it is the central point of dispute. Minton argues that the experimental-use exception properly applied to his lease to Stark, saving his patent from the on-sale bar; petitioners argue that it did not. This is just the sort of “ ‘dispute ... respecting the . . . effect of [federal] law’ ” that Grable envisioned. 545 U. S., at 313 (quoting Shulthis v. McDougal, 225 U. S. 561, 569 (1912)).
[*260] c
Minton’s argument founders on Grable’s next requirement, however, for the federal issue in this case is not substantial in the relevant sense. In reaching the opposite conclusion, the Supreme Court of Texas focused on the importance of the issue to the plaintiff’s case and to the parties before it. 355 S. W. 3d, at 644 (“because the success of Minton’s malpractice claim is reliant upon the viability of the experimental use exception as a defense to the on-sale bar, we hold that it is a substantial federal issue”); see also Air Measurement Technologies, 504 F. 3d, at 1272 (“the issue is substantial, for it is a necessary element of the malpractice case”). As our past cases show, however, it is not enough that the federal issue be significant to the particular parties in the immediate suit; that will always be true when the state claim “necessarily raise[s]” a disputed federal issue, as Grable separately requires. The substantiality inquiry under Grable looks instead to the importance of the issue to the federal system as a whole.
In Grable itself, for example, the Internal Revenue Service had seized property from the plaintiff and sold it to satisfy the plaintiff’s federal tax delinquency. 545 U. S., at 310-311. Five years later, the plaintiff filed a state law quiet title action against the third party that had purchased the property, alleging that the Internal Revenue Service had failed to comply with certain federally imposed notice requirements, so that the seizure and sale were invalid. Ibid. In holding that the case arose under federal law, we primarily focused not on the interests of the litigants themselves, but rather on the broader significance of the notice question for the Federal Government. We emphasized the Government’s “strong interest” in being able to recover delinquent taxes through seizure and sale of property, which in turn “require[d] clear terms of notice to allow buyers ... to satisfy themselves that the Service has touched the bases necessary for good title.” Id., at 315. The Government’s “direct in[*261] terest in the availability of a federal forum to vindicate its own administrative action” made the question “an important issue of federal law that sensibly belong[ed] in a federal court.” Ibid.
A second illustration of the sort of substantiality we require comes from Smith v. Kansas City Title & Trust Co., 255 U. S. 180 (1921), which Grable described as “[t]he classic example” of a state claim arising under federal law. 545 U. S., at 312. In Smith, the plaintiff argued that the defendant bank could not purchase certain bonds issued by the Federal Government because the Government had acted unconstitutionally in issuing them. 255 U. S., at 198. We held that the case arose under federal law, because the “decision depends upon the determination” of “the constitutional validity of an act of Congress which is directly drawn in question.” Id., at 201. Again, the relevant point was not the importance of the question to the parties alone but rather the importance more generally of a determination that the Government “securities were issued under an unconstitutional law, and hence of no validity.” Ibid.) see also Merrell Dow Pharmaceuticals Inc. v. Thompson, 478 U. S. 804, 814, n. 12 (1986).
Here, the federal issue carries no such significance. Because of the backward-looking nature of a legal malpractice claim, the question is posed in a merely hypothetical sense: 7/Minton’s lawyers had raised a timely experimental-use argument, would the result in the patent infringement proceeding have been different? No matter how the state courts resolve that hypothetical “case within a case,” it will not change the real-world result of the prior federal patent litigation. Minton’s patent will remain invalid.
Nor will allowing state courts to resolve these cases undermine “the development of a uniform body of [patent] law.” Bonito Boats, Inc. v. Thunder Craft Boats, Inc., 489 U. S. 141, 162 (1989). Congress ensured such uniformity by vesting exclusive jurisdiction over actual patent cases in the fed[*262] eral district courts and exclusive appellate jurisdiction in the Federal Circuit. See 28 U. S. C. §§ 1338(a), 1295(a)(1). In resolving the nonhypothetical patent questions those cases present, the federal courts are of course not bound by state court case-within-a-case patent rulings. See Tafflin v. Levitt, 493 U. S. 455, 465 (1990). In any event, the state court case-within-a-case inquiry asks what would have happened in the prior federal proceeding if a particular argument had been made. In answering that question, state courts can be expected to hew closely to the pertinent federal precedents. It is those precedents, after all, that would have applied had the argument been made. Cf. ibid. (“State courts adjudicating civil RICO claims will ... be guided by federal court interpretations of the relevant federal criminal statutes, just as federal courts sitting in diversity are guided by state court interpretations of state law”).
As for more novel questions of patent law that may arise for the first time in a state court “case within a case,” they will at some point be decided by a federal court in the context of an actual patent case, with review in the Federal Circuit. If the question arises frequently, it will soon be resolved within the federal system, laying to rest any contrary state court precedent; if it does not arise frequently, it is unlikely to implicate substantial federal interests. The present case is “poles apart from Grable,” in which a state court’s resolution of the federal question “would be controlling in numerous other cases.” Empire HealthChoice Assurance, Inc., 547 U. S., at 700.
Minton also suggests that state courts’ answers to hypothetical patent questions can sometimes have real-world effect on other patents through issue preclusion. Brief for Respondent 33-36. Minton, for example, has filed what is known as a “continuation patent” application related to his original patent. See 35 U. S. C. § 120; 4A D. Chisum, Patents § 13.03 (2005) (describing continuation applications). He argues that, in evaluating this separate application, the[*263] patent examiner could be bound by the Texas trial court’s interpretation of the scope of Minton’s original patent. See Brief for Respondent 35-36. If is unclear whether this is true. The Patent and Trademark Office’s Manual of Patent Examining Procedure provides that res judicata is a proper ground for rejecting a patent “only when the earlier decision was a decision of the Board of Appeals” or certain federal reviewing courts, giving no indication that state court decisions would have preclusive effect. See Dept, of Commerce, Patent and Trademark Office, Manual of Patent Examining Procedure §706.03(w), p. 700-79 (rev. 8th ed. 2012); 35 U. S. C. §§ 134(a), 141,145; Reply Brief 9-10. In fact, Minton has not identified any case finding such preclusive effect based on a state court decision. But even assuming that a state court’s case-within-a-case adjudication may be preclu-sive under some circumstances, the result would be limited to the parties and patents that had been before the state court. Such “fact-bound and situation-specific” effects are not sufficient to establish federal arising under jurisdiction. Empire HealthChoice Assurance, Inc., supra, at 701.
Nor can we accept the suggestion that the federal courts’ greater familiarity with patent law means that legal malpractice cases like this one belong in federal court. See Air Measurement Technologies, 504 F. 3d, at 1272 (“The litigants will also benefit from federal judges who have experience in claim construction and infringement matters”); 355 S. W. 3d, at 646 (“patent litigants have an interest in the uniform application of patent law by courts well-versed in that subject matter”). It is true that a similar interest was among those we considered in Grable. 545 U. S., at 314. But the possibility that a state court will incorrectly resolve a state claim is not, by itself, enough to trigger the federal courts’ exclusive patent jurisdiction, even if the potential error finds its root in a misunderstanding of patent law.
There is no doubt that resolution of a patent issue in the context of a state legal malpractice action can be vitally im[*264] portant to the particular parties in that case. But something more, demonstrating that the question is significant to the federal system as a whole, is needed. That is missing here.
D
It follows from the foregoing that Grable’s fourth requirement is also not met. That requirement is concerned with the appropriate “balance of federal and state judicial responsibilities.” Ibid. We have already explained the absence of a substantial federal issue within the meaning of Grable. The States, on the other hand, have “a special responsibility for maintaining standards among members of the licensed professions.” Ohralik v. Ohio State Bar Assn., 436 U. S. 447, 460 (1978). Their “interest... in regulating lawyers is especially great since lawyers are essential to the primary governmental function of administering justice, and have historically been officers of the courts.” Goldfarb v. Virginia State Bar, 421 U. S. 773, 792 (1975) (internal quotation marks omitted). We have no reason to suppose that Congress—in establishing exclusive federal jurisdiction over patent cases—meant to bar from state courts state legal malpractice claims simply because they require resolution of a hypothetical patent issue.
* * ⅜
As we recognized a century ago, “[t]he Federal courts have exclusive jurisdiction of all cases arising under the patent laws, but not of all questions in which a patent may be the subject-matter of the controversy.” New Marshall Engine Co. v. Marshall Engine Co., 223 U. S. 473, 478 (1912). In this case, although the state courts must answer a question of patent law to resolve Minton's legal malpractice claim, their answer will have no broader effects. It will not stand as binding precedent for any future patent claim; it will not even affect the validity of Minton’s patent. Accordingly, there is no “serious federal interest in claiming the advan[*265] tages thought to be inherent in a federal forum,” Grable, supra, at 313. Section 1338(a) does not deprive the state courts of subject matter jurisdiction.
The judgment of the Supreme Court of Texas is reversed, and the case is remanded for further proceedings not inconsistent with this opinion.
It is so ordered.