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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 171
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IgrS. } INVENTOR J. H. MOUNT. TALKING MACHINE. APPLIOATIOH riLED MAI 9. 1908. 949,939. Patented Feb. 22,1910. 6 SHEETS—SHEET S.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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