National Museum of American History
Patent Model of a Copying Press
Powlett, James A. · ca 1877
This patent model demonstrates an invention for a copying press which was granted patent number 193346. The patent describes a letter-copying press in which the pressure was produced by inflating an air bag.
🔒
Order museum-quality prints
Sign in to order prints, canvas, and more of this work. Browsing and full-resolution downloads stay free.