Patent and Trademark Depository Library Program (PTDL)

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Patent and Trademark Depository Library Program (PTDLP) Directory of Libraries

The U.S. Patent and Trademark Office (USPTO) has specially designated some 85 libraries throughout the U.S. as Patent and Trademark Depository Libraries (PTDL).

These libraries are open to the public and provide specialized resources and services to patent users.

Click on the state name to see the listings for each state.

Alabama
Alaska
Arkansas
California
Colorado
Delaware
District of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Puerto Rico
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Washington
West Virginia
Wisconsin
Wyoming