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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 212
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No. 663,192 Patented Dec. 4, F900. F. MYERS. SOUND RECORDING AND REPRODUCING INSTRUMENT. (Application filed Aug. 1, 19C0. ; (No-Model.) 2 Sheets— Sheet 2. _^.^. J ^ .^^.3 … ^^/J^^AlPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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