Patent and Trademark Depository Library Program (PTDLP)

See the PTDLP Library Directory for a state-by-state listing of PTDL Libraries.

• The U.S. Patent and Trademark Office (USPTO) has specially designated over 80 libraries throughout the U.S. as Patent and Trademark Depository Libraries (PTDL).

• PTDL Libraries are open to the public and provide specialized services for people seeking patent and trademark information. If you have a PTDL Library close to you, a visit to it may save you hours of searching.
  

• PTDL Libraries receive and make available to users: -Utility, Design, Plant and Reissue Patents
  - Reexamination Certificates
  - Statutory Invention Registrations (SIRs)
  -Post-issue patent status information
  -The Official Gazette of the U.S. Patent and Trademark Office (both patent and trademark sections)
  -All PTO search tools, indices and directories
  

• PTDL Libraries are required to have at least 20 years of U.S. Patents available for the public; many PTDL Libraries have much more extensive collections of patents.

Web www.patent-search-information.com

return to home
Copyright 2004-08 Patent Search Information Site
Latest Update: 8/12/07
comments@patent-search-information.com

Disclaimer: The Patent Search Information site is the work of an information specialist with over 25 years of experience and strives to be as accurate and useful as possible. However, no information from this site should be construed in any way as providing legal advice. Consult an attorney if you need legal advice.