U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
(a) We assign file numbers to electronic applications in order to facilitate processing.
(b) We only assign file numbers for administrative convenience; they do not mean that an application is acceptable for filing.
(c) For a description of file number information, see The International Bureau Filing System File Number Format Public Notice, DA-04-568 (released February 27, 2004).
