U.S. Patent and Trademark Office

The United States Patent and Trademark Office site does not feature an explicit history section, but the Kids' Pages include a number of activities and information associated with historical topics and research methods. The Time Machine Section includes a Calendar of Famous and Not-So-Famous Patents and Trademarks, Historic Press Releases, access to patents dating back to 1790 and the story of The Great Patent Fire of 1836.

Other features include an overview of Women Inventors, a brief history of trademarks, and How to Be a Patent Detective.