Regulations last checked for updates: Feb 09, 2026

Title 37 - Patents, Trademarks, and Copyrights last revised: Jan 01, 2026
§ 7.3 - Correspondence must be in English.

International applications and registrations, requests for extension of protection and all other related correspondence with the Office must be in English. The Office will not process correspondence that is in a language other than English.

authority: 15 U.S.C. 1123,35.S.C. 2, Pub. L. 116-260, 134 Stat. 1182, unless otherwise noted
source: 68 FR 55769, Sept. 26, 2003, unless otherwise noted.
cite as: 37 CFR 7.3