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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 1131
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QftotMSlJ 1,268,729. A. L KIRKWOOD. COMBINATION MOTION PICTURE AND SOUND REPRODUCING MECHANISM.APPLICATION FILED APR. 11, 1916. Patented June 4,1918. 3 SHEETS-SHEET 3..Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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