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Stevens Rocking Grate Bar, 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 Francis B. Stevens, November 11, 1879, no. 221430.
National Museum of American History’s own descriptionCredit lineStevens Rocking Grate Bar, Patent Model. 1879. Stevens, Francis B.. National Museum of American History. CC0.
