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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 116
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F. L. DYER. PHONOGRAPH REPRODUCER. APPLIOATIOH TILED MAS. 18, 1909. 985,736. Patented Feb. 28, 1911. … ; PETCRS CO.. WASHINGTON,Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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