U.S. Post Office, Washington.
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U.S. Post Office.
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General Post Office, Washington.
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General Office, Washington, D.C.
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The U.S. Post Office - Washington.
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U.S. Post Office.
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U.S. Post Office, Washington, D.C.
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U.S. Post Office.
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U.S. Post Office.
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Post Office Building, Washington.
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Model Room, Patent Office, Washington, D.C.
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Model Room of Patent Office, Washington, D.C.
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U.S. Patent Office,(South)
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Patent Office.
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Washington, the Patent Office.
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New Wing, Patent Office, Washington, D.C., U.S.A.
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Patent Office Court Yard, Washington, D.C.
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Patent Office, Washington, D.C.
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U.S. Patent Office.
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The U.S. Patent Office.
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U.S. Patent Office.
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U.S. Patent Office.
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The U.S. Patent Office.
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U.S. Patent Office.
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The U.S. Patent Office.
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Washington, D.C., Patent Office.
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The U.S. Patent Office.
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U.S. Patent Office.
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U.S. Patent Office, Washington, D.C.
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Interior, Patent Office.
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