‘Patent Office’ historical pictures (exact matches)

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Patent-Office, Washington, D C – Examiners at Work
Patent-Office, Washington, D C – Examiners at Work
Ball in Honour of President Lincoln in the Great Hall of the Patent Office at Washington, from the Illustrated London News
Ball in Honour of President Lincoln in the Great Hall of the Patent Office at Washington, from the Illustrated London News
Hiram Maxim Pumping Engine, Patent Model
Hiram Maxim Pumping Engine, Patent Model
Patent Office
Patent Office
The Patent Office, Washington
The Patent Office, Washington
The Patent Office Library
The Patent Office Library
United States Patent-Office Department, Washington, D C
United States Patent-Office Department, Washington, D C
U S Patent Office
U S Patent Office