Are two separate databases and are searched separately. Issued patents are available from 1789-present and published applications are available since March 2001.

Is necessary for viewing issued patents and published applications on the United States Patent and Trademark web site.

Searches databases that U.S. patent examiners use at the Patent Office. The system has flexibility and is available at the Engineering Library only. Contact Charlotte Erdmann for an appointment.

More Cassis Patent Databases are available at Engineering Library that permit downloading and selected printing. [Not currently available]

Provides a brief one page guide to searching and reviewing patents. It is focused on USPTO databases

Gives status of a issued patent and published application and its history.

Shows assignor and assignee data changes after issued patents and published publications.

Give recommended databases that examiners use to search for prior

Can be used for downloading gene sequences. Access is by document number and date.

Is helpful for chemical U.S. and international patents as well as journal articles, conference papers, and book chapters. It is licensed for Purdue users only.

Permits full-text and fielded searching. It is licensed for Purdue users only.

Offers keyword and gene sequence searching for patents since 1976. Full-text is in PDF.