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Otto and Bell Balanced Slide Valve, Patent Model
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
This model was submitted to the U.S. Patent Office with the application for the patent issued to Henry Otto and Patrick F. Bell, of Bloomington, Illinois, December 18, 1883, no. 290650.
National Museum of American History’s own descriptionCredit lineOtto and Bell Balanced Slide Valve, Patent Model. 1883. Otto, Henry. National Museum of American History. CC0.
