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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 988
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No. 805,600. PATENTED NOV. 28, 1905. E. WALKER. COMPOSITE SOUND PRODUCER. APPLICATION FILED SEPT, 14, 1904. 2 SHEETS— SHEET 1, … JOy J3 13 3}&j.<3. cJ?gf • <£- INVENTOR WITNESSES: Edwin fl&lker, Bt, ATTORNEYS.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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