Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 343
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Attorneys H. W. ROGERS.SYNCHRONIZING MECHANISM FOR MOTION PICTURE AND SOUND REPRODUCING MACHINES. APPLICATION FILED NOV. 18, 1916. 1,255,823. Patented Feb. 5,1918. 3 SHEETS—SHEET 3.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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