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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 594
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J. J. FROESS. COMBINED PIANOAND GRAPHOPHONE. APPLICATION FILED OCT. 13. 1916. 1,242,790. Patented Oct. 9, 1917. 2 SHEETS-SHEET 2. z^sc^tzi' <^z . £&> &7 £J … GWitrtVCOS&Z SStj Oo^JVo-*-Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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