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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 56
![An illustration from [Graphophone patents], 1878, leaf 56](https://img.insideoutlibrary.com/img/1024/ia-graphophonepaten02unit-56-21.webp)
r—A-- … cJ-H-1^€44.-to-& S)l^ ^ Cttto^vie 7^ (No Model.) 3 Sheets—Sheet 3 J. F. OTT. ATTACHMENT FOE PHONOGEAPHS. No. 466,922. Patented Jan. 12, 1892.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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