U.S. Patent Office, Washington, D.C.
Corridor in U.S. Patent Office.
Blue Corridor in the U.S. Patent Office.
Blue Corridor in the U.S. Patent Office.
Corridor in U.S. Patent Office.
Blue Corridor, in the U.S. Patent Office.
The Blue Corridor in the U.S. Patent Office.
Model Room, in the U.S. Patent Office.
Blue Corridor in the U.S. Patent Office.
Corridor in U.S. Patent Office.
Model Room, (In U.S. Patent Office).
Model Room, Patent Office.
Model Room of Patent Office.
Model Room of Patent Office.
Interior. U.S. Patent Office.