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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 144
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No. 768,728. PATENTED AUG. 30, 1904. T. BIRNBAUM. ELECTRICALLY ACTUATED GRAMOPHONE. APPLICATION FILED MAT 5, 1902. 3 SHEETS-SHEET 2. HO MODEL. !&££>*-Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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