Find Primary Sources Online

Easier to use than the USPTO website, but not as complete.

Digitized patent drawings that trace the course of invention in the United States from the 19th to early 20th century.

The best place to learn about American patents and trademarks; the patent and appeals process ; the history of the USPTO; and the enforcement of intellectual property laws.

Searchable database of NASA reports.

U.S. government agency technical reports.