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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 whose two sides were opened or closed by wedges governed by a central double-threaded screw; the invention was granted patent number 139351.
National Museum of American History’s own descriptionSubjects
Credit linePatent model for printers' quoins. ca 1873. Ames, Chauncey W.. National Museum of American History. CC0.
