CC0 · no rights reserved
Patent model for printers' quoins
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 screw quoin, adjustable with any common wrench; the invention was granted patent number 167780.
National Museum of American History’s own descriptionCredit linePatent model for printers' quoins. ca 1875. O'Shea, Andrew Jackson. National Museum of American History. CC0.
