"The United States Patent and Trademark Office (USPTO) is the Federal agency for granting U.S. patents and registering trademarks. In doing this, the USPTO fulfills the mandate of Article I, Section 8, Clause 8, of the Constitution that the Executive branch "promote the progress of science and the useful arts by securing for limited times to inventors the exclusive right to their respective discoveries." The USPTO registers trademarks based on the Commerce Clause of the Constitution (Article 1, Section 8, Clause 3)."
The Copyright Office is an office of record, a place where claims to copyright are registered and where documents relating to copyright may be recorded when the requirements of the copyright law are met. The Copyright Office furnishes information about the provisions of the copyright law and the procedures for making a registration or recordation, explains the operations and practices of the Copyright Office, and reports on facts found in the public records of the Office. The Office also administers the mandatory deposit provisions of the copyright law and the various compulsory licensing provisions of the law, which include collecting royalties.