37 C.F.R. § 3.81

(a) With payment of the issue fee: An application may issue in the name of the assignee consistent with the application's assignment where a request for such issuance is submitted with payment of the issue fee, provided the assignment has been previously recorded in the Office. If the assignment has not been previously recorded, the request must state that the document has been filed for recordation as set forth in § 3.11.

(b) After payment of the issue fee: Any request for issuance of an application in the name of the assignee submitted after the date of payment of the issue fee, and any request for a patent to be corrected to state the name of the assignee, must state that the assignment was submitted for recordation as set forth in § 3.11 before issuance of the patent, and must include a request for a certificate of correction under § 1.323 of this chapter (accompanied by the fee set forth in § 1.20(a)) and the processing fee set forth in § 1.17(i) of this chapter.

(c) Partial assignees. (1) If one or more assignee, together with one or more inventor, holds the entire right, title, and interest in the application, the patent may issue in the names of the assignee and the inventor.

(2) If multiple assignees hold the entire right, title, and interest to the exclusion of all the inventors, the patent may issue in the names of the multiple assignees.