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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 246
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T. BIRNBAUM. AUTOMATIC BRAKE FOR TALKING MACHINES. APPLICATION FILED NOV. 15, 1909. 1,021,756. Patented Apr. 2, 1912. 3 SHEETS-SHEET 3. J^y^vgf.O. JCz.^. 7, … INVENTOR SC^ WITNESSES BY ATTORNEY COLUMBIA PLaNOORAPH CO., WASHINOTON. O. C.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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