Linda Hall Library is one of over 80 libraries in the United States that participate in the Patent and Trademark Resource Center (PTRC) Program. The PTRC Program is administered by the U.S. Patent and Trademark Office.

Through the PTRC Program, the U.S. Patent and Trademark Office (PTO) provides participating libraries with a variety of patent and trademark information and resources, including tools for patent and trademark searching. The PTRC Program webpage lists basic materials/services available at PTRCs.

PTRCs are provided with tools that can be used by the general public to conduct patent searching. Conducting a patent search is a complicated and time-consuming process. Reference librarians can explain the steps involved in a patent search using the U.S. Patent Classification System. See the PTRC Program's webpage for a description of the steps involved in conducting a patent search at a PTRC.

The completeness or accuracy of a search rests entirely on the individual doing the search. Reference librarians cannot conduct searches for patrons, nor provide legal advice or opinions. Users are urged to consult a patent attorney for legal advice. Appointments are encouraged for individuals new to the process of doing a patent or trademark search.

For more information contact the Library's Reference Department.

Additional resources from the United States Patent and Trademark Office's website.

• General Information Concerning Patents patent brochure available on PTO's website.
• PTO's searchable patents database on their website.
• Basic Facts About Trademarks trademark booklet available on PTO's website.
• Trademark Information on PTO's website - includes link to TESS, the PTO's searchable trademark database.

Other patent and trademark related websites:

• U.S.Code, Title 35 Patents
• U.S.Code, Title 15, Chapter 22, Trademarks.
• World Intellectual Property Organization website.
• European Patent Office website. Includes link to "esp@cenet" worldwide patent database.
• International Trademark Association website.