Model Room, in the U.S. Patent Office.
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Blue Corridor in the 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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Corridor in U.S. Patent Office.
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Model Room, (In U.S. Patent Office).
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Model Room, Patent Office.
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Model Room of Patent Office.
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Model Room of Patent Office.
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The Patent Office.
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The Patent Office.
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Interior. U.S. Patent Office.
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The Patent Office.
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U.S. Patent Office, Washington, D.C.
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U.S. Patent Office.
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U.S. Patent Office, Washington, D.C.
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Patent Office.
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Patent Office.
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U.S. Patent Office. Front View.
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Interior view. Patent Office.
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Interior view. Patent Office.
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Patent Office.
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South Hall of Patent Office.
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Patent Office, Washington.
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New Wing, Patent Office, Washington, D.C.
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Model Room of the U.S. Patent Office.
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Portico, South Front.
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Patent Office Corridor.
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Patent Office Corridor.
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