United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 1043
a F-iS.5 WITNESSES INVENTOR ATTORNEY. COLUMBIA PLANOORAPH CO.. WASHINGTON, D. C. W. ROTTER. APPARATUS FOR MAKING PHONOGRAPH RECORDS. APPLICATION FILED NOV. 19, 1910. 1,162,256. Patented tfov. 30, 1915. 4 SHEETS^SHEET 3.
Phonograph · Patents
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