Search for: Title Author Subject Series that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # United States. Patent Office 15 SEE ALSO later heading: United States. Patent and Trademark Office 50 United States. Patent Office (1793-1975) 1 United States. Patent Office. Office of Documentation. 1 United States. Patent Office. Office of Search Systems and Documentation. 1 United States. Patrulla Fronteriza -- SEE: U.S. Border Patrol 1 United States. Patuxent Wildlife Research Center -- SEE: Patuxent Wildlife Research Center 4 United States. Pay Department (War Department) -- SEE: United States. War Department. Pay Department 1 United States. Pay Dept. (War Dept.) -- SEE: United States. War Department. Pay Department 1 United States Peace Corps -- SEE: Peace Corps (U.S.) 123 SEE: Peace Corps (U.S.) 123 United States. Peace Institute -- SEE: United States Institute of Peace 404 SEE: United States Institute of Peace 404 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >