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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 202
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No. 6l8,3gd. Patented Jan. 31, 1899. G. BETTINI. PHONOGRAPH. (AppUcation filed Feb. 11, 1807.) (No Model.; 4 Sheets— Sheet 4. I WITNESSES: INVENTOR B '/l^ ATTORNEYPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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