CFR›Title 37›Chapter I›Part 1›Subpart C›Subject Group Who May File an International Application ContainsSections 1.421–1.424CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 1.421 § 1.421 Applicant for international application. 1.422 § 1.422 Legal representative as applicant in an international application. 1.423 § 1.423 [Reserved] 1.424 § 1.424 Assignee, obligated assignee, or person having sufficient proprietary interest as applicant in an international application. Previous Unity of Invention Unity of Invention