Corridor in U.S. Patent Office.

Blue Corridor in the U.S. Patent Office.

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 U.S. Patent Office.

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.

The U.S. Patent Office.

U.S. Patent Office.

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.

The Patent Office.

The Patent Office.

Interior. U.S. Patent Office.

The Patent Office.

U.S. Patent Office, Washington, D.C.

U.S. Patent Office.

U.S. Patent Office, Washington, D.C.

Patent Office.

Patent Office.

U.S. Patent Office. Front View.

Interior view. Patent Office.