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G. H. Crosby Indicator, Patent Model
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
This indicator was filed to the U.S. Patent Office with the application for patent no. 219149 issued to G. H. Crosby, September 2, 1879.
National Museum of American History’s own descriptionCredit lineG. H. Crosby Indicator, Patent Model. 1879. Crosby, George H.. National Museum of American History. CC0.
