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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 446
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ITo. 739,954. . PATENTED SEPT. 29, 1903. G. H. VILLY. HORN FOR PHONOGRAPHS, EAR TRUMPETS, &o. APPLICATION PILED DEO. 8. 1902. HO MODEL. 3 SHEETS-SHEET 2.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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