The Library will close at 5 pm on Friday, July 3 and will remain closed on Saturday, July 4, 2015
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Intellectual Property

Patent and Trademark Resource Center Program (PTRCP)

The Carnegie Library of Pittsburgh has been a patent and trademark depository library since 1902, and is one of over eighty U.S. Patent and Trademark Resource Centers located throughout the country. These libraries are designated by the United States Patent and Trademark Office to make patent and trademark materials freely available to the public and to publicize patent and trademark information.

The Reference Services Department staff can assist individuals with preliminary patent or trademark searches. Librarians cannot do the actual search or interpret patent and trademark law, but can help you with the following resources in our collection:


For help finding a patent or trademark in the microfilm collection, please stop by the reference desk in Reference Services on the second floor of CLP - Main for assistance.

  • Patents from 1790-1999
  • Official gazette from 1872-1978
  • Reissue Patents
  • U.S. Patents CDR File


Most of our print patent and trademark materials are located at the Main Library in Oakland, but some are off-site. Please stop at the reference desk in Reference Services on the second floor of CLP - Main for assistance.


PubWEST: This is the public version of the Web-based Examiner Search Tool (WEST). Available at CLP-Main, it's best for advanced searchers and provides a fast search of patents across multiple databases. Contact the Reference Services Department at CLP - Main for an appointment at 412-622-3175.

USPTO website: Library staff can help you get started searching the USPTO website for patents, patent applications, and trademarks.