The Patent and Trademark Depository Library Program (PTDLP) administers a nationwide network of public, state and academic libraries designated as Patent and Trademark Depository Libraries authorized by 35 U.S.C. 12 to:

• Disseminate Patent and Trademark Information

• Support Diverse Intellectual Property Needs of the Public

For more information please contact us at:

United States Patent and Trademark Office
P.O. Box 1450, Alexandria, VA 22313-1450

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