Matches in DBpedia 2014 for { ?s ?p The Post Office Department (1792–1971) was the name of the United States Postal Service prior to it being a Cabinet department, and during the time that it was at cabinet-level, officially from 1872 to 1971. It was headed by the Postmaster General.The Postal Service Act signed by President George Washington on February 20, 1792, established the Department.. }
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- United_States_Post_Office_Department comment "The Post Office Department (1792–1971) was the name of the United States Postal Service prior to it being a Cabinet department, and during the time that it was at cabinet-level, officially from 1872 to 1971. It was headed by the Postmaster General.The Postal Service Act signed by President George Washington on February 20, 1792, established the Department.".