application number
application number. Patents & trademarks. The eight-digit sequential number assigned by the U.S. Patent and Trademark Office to a patent or trademark application. • Applications are typically referred to by application number, which consists of a two-digit series code, a slash, and a six-digit serial number. References to patent applications also include the filing date ( application no. 08/944,183, filed September 20, 1978). — Also termed serial number.
