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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 281
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E. L. 6REENSFELDER.METHOD AND APPARATUS FOR SYNCHRONOUSLY PRODUCING SOUNDS TO ACCOMPANY MOTION PICTURES. APPLICATION FILED MAR. 30. 1916. Patented Jan. 29,1918. 4 SHEETS-SHEET 4. J? FfyJO. 1,254,684. -2%&-41. … Jtygr.12. 62Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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