Allen Two-Motion Cone-Valve, Patent Model
National Museum of American History

Allen Two-Motion Cone-Valve, Patent Model

Allen, Horatio · 1855

wood (overall material)
National Museum of American History
CC0 — Public Domain
National Museum of American History

This model was submitted to the U.S. Patent Office with the application for the patent issued to Horatio Allen, of New York, New York, June 19, 1855, no. 13075.

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