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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 searchable back to 1976. This means that searching for patents via keyword will primarily 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.  More information is available on the USPTO Search for patents portal.

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 Patents
Google Patents is a database of full-text patents. Includes patent documents from the United States Patent & Trademark Office, European Patent Office, Canada, China, Germany, WIPO, and other patent offices . For an overview and search tips, see the  About Google Patents page. To determine current CPC classifications, use the tools available at the USPTO website.

Patent Lens
Open public patent database indexing patent documents from national and regional patent offices. Full-text documents from the US, WIPO, and EPO are available.

FreePatentsOnline (FPO)
FreePatentsOnline (FPO) provides a free patent search database. The patent search database includes US patents and US patent applications as well as documents from the European Patent Office, WIPO, Japan and Germany. FPO also offers data, citation, and other tools and resources.


While the Library reference service staff is happy to provide assistance with your patent or trademark research, 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)
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. The USPTO has additional information about Searching the Trademark Database.

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.