It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
How Do I Find Patents?
This guide provides information about patents and help for finding the resources you need.
Searchable full-text/full page images of U.S. patents from the United States Patent and Trademark Office (USPTO). It is an alternative interface to searching USPTO. It is Google, so it is easy to search.