Confirmation Number Law and Legal Definition

Confirmation number, in relation to Patent law refers to the four-digit number assigned to each newly filed patent application. The confirmation number, along with the application number, is used to verify the accuracy of the application number. The application number is usually placed on the correspondence filed with the United States Patent and Trademark Office (PTO) for avoiding misidentification of an application due to a transposition error in the application number. The PTO recommends applicants to include the application's confirmation number on all correspondence submitted to the PTO in relation to the application.