United States Patent and Trademark Office
The United States Patent and Trademark Office (USPTO) was established by the act of July 19, 1952 (35 U.S.C. 1) to promote the progress of science and the useful arts by securing for limited times to inventors the exclusive right to their respective discoveries for a certain period of time (Article I, Section 8 of the United States Constitution). The registration of trademarks is based on the commerce clause of the U.S. Constitution.
Class stem: C 21 - U.S. Patent and Trademark Office publications repository
