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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 248
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L. M. FLAG6. AUTOMATIC DISK REPEATING PHONOGRAPH. APPLICATION FILED MAY 31, 1916. Patented Aug. 14,1917. 1,236,920. 8 SHEETS-SHEET 5.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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