US Patent & Trademark Office

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 legislative branch “promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries.” The USPTO registers trademarks based on the commerce clause of the Constitution (Article I, Section 8, Clause 3).

Has your invention already been patented by the USPTO?
Search the collection of patents from 1790 at this link.