‘Patent Office’ historical pictures (exact matches)

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
Patent-Office, Washington, D C – Examiners at Work
Patent-Office, Washington, D C – Examiners at Work
Miller Mercury Motor, Patent Model
Miller Mercury Motor, Patent Model
Murdock Injector, Patent Model
Murdock Injector, Patent Model
Worthington Direct-Acting Steam Pump, Patent Model
Worthington Direct-Acting Steam Pump, Patent Model
Patent Office, Washington
Patent Office, Washington
U S Patent Office
U S Patent Office
Taffrail Log Recorder, Patent Model
Taffrail Log Recorder, Patent Model