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 quoins that were expanded by turning an internal screw; the invention was granted patent number 158001.
National Museum of American History’s own descriptionCredit linePatent model for printers' quoins. ca 1874. Quail, William. National Museum of American History. CC0.
