37 CFR § 1.42 - Applicant for patent.
(b) If a person is applying for a patent as provided in § 1.46, the word “applicant” refers to the assignee, the person to whom the inventor is under an obligation to assign the invention, or the person who otherwise shows sufficient proprietary interest in the matter, who is applying for a patent under § 1.46 and not the inventor.
(c) If fewer than all joint inventors are applying for a patent as provided in § 1.45, the phrase “the applicant” means the joint inventors who are applying for the patent without the omitted inventor(s).
(d) Any person having authority may deliver an application and fees to the Office on behalf of the applicant. However, an oath or declaration, or substitute statement in lieu of an oath or declaration, may be executed only in accordance with § 1.63 or 1.64, a correspondence address may be provided only in accordance with § 1.33(a), and amendments and other papers must be signed in accordance with § 1.33(b).
(e) The Office may require additional information where there is a question concerning ownership or interest in an application, and a showing may be required from the person filing the application that the filing was authorized where such authorization comes into question.