Inside Out Library · ExploreAnnual report of the Commissioner of Patents for the year 1869 (1876)United States. Patent Office · Washington : G.P.O · leaf 378United States. Patent Office · PatentsInternet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.More pictures from Annual report of the Commissioner of Patents for the year 1869More like this
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten12unit-778-0.webp)
