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Research Guides

Patent and Trademark Information: Additional Patent & Trademark Search Resources

Selected Patent Databases

USPTO Web Patent Databases
Access to the US Patent Full-Text and Full-Page Image Databases. Issued Patents (PatFT) is a database of the full text content of US patents issued from January 1, 1976 to the most recent weekly issue date. Full-page images are also available from 1790 to the present. Follow the instructions about accessing the images. The full-text is only searchable back to 1976. This means that searching for patents via keyword will only retrieve patents issued since the 1970s. You can search all the way back to 1790 using either the patent classification system or specific patent numbers. The Published Applications (AppFT) database, a full-text and full-page image database of US patent applications published since March 15, 2001, is also available. Please read and understand the Important Notices and Policies section section of the main Patent Full-Text and Full-Page Image Databases page prior to using either PatFT or AppFT. Help Files are available for each database as well.

Public PAIR (Patent Application Information Retrieval)
The U.S. Patent & Trademark Office Public PAIR system includes status, maintenance fee and file history information for United States patents. PDF images of some documents included. Online ordering of patent documents is available.

Google Patent Search
Google Patent Search is a database of full-text patents issued by the U.S. Patent & Trademark Office since 1790. Search by keyword. For current US classification searching, follow the "Advanced Google Patent Search Tips" on the About Google Patent Search page. To determine current US classifications, use the tools available at the USPTO website. Patent applications are not included. Includes images of issued patents in .pdf format. See Google Patent Search Help for more information.

FreePatentsOnline (FPO)
FreePatentsOnline (FPO) provides a free patent search database.  They also provide patent analysis software and other patent data services (for a fee).  The patent search database includes US patents and US patent applications as well as documents from the European Patent Office, WIPO, Japan and Germany.


While the Library reference service staff is happy to provide assistance with your search, we cannot perform searches, evaluate searches, assist with your application or dispense legal advice.

The University of Washington and its employees are providing a service of an informational nature with no express or implied warranty for results and assume no obligation or liability for damage arising out of the use, or inability to use, the information provided.  Every effort is made to keep this information up to date. However, errors and omissions may occur.

For the most up-to-date information or legal advice, please contact a patent or trademark attorney.

Selected Trademark Databases

U.S. Trademark Electronic Search System (TESS)
This page is the starting point for the USPTO's trademark information. Click on "Search" under "Get a Trademark Registration..." or visit the USPTO's Trademark Electronic Business Center (EBC). The U.S. Patent & Trademark Office TESS database contains more than 2.9 million pending, registered and dead federal trademarks. Updates scheduled daily on Tuesdays through Saturdays. Please read and understand the HELP section, the News! section, the Update Information section and the Important Notices section of the TESS main page prior to using this database. Images are available for most trademarks which have images associated with them.

Trademark Status and Document Retrieval (TSDR) Database
The U.S. Patent & Trademark Office TSDR database lists current status information about pending and registered trademarks. Search by trademark serial number or registration number. Trademark records in TESS provide links to the status information displayed in TSDR.