C.F.R. » Title 37 » CHAPTER I—UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE › SUBCHAPTER A—GENERAL › PART 1—RULES OF PRACTICE IN PATENT CASES › Subpart C—International Processing Provisions

37 C.F.R. § 1.437

The drawings

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(a) Drawings are required when they are necessary for the understanding of the invention (PCT Art. 7).

(b) The physical requirements for drawings are set forth in PCT Rule 11 and shall be adhered to.

[72 FR 51563, Sept. 10, 2007]