CC0 · no rights reserved
Patent model for perforating machine
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
This patent model demonstrates an invention for a perforating machine. Maker, patent number, and date are unknown.
National Museum of American History’s own descriptionCredit linePatent model for perforating machine. unknown. unknown. National Museum of American History. CC0.
