United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 429
€<7^ J0^k//7 sjf&Zfeu tor A. R. SCHWARZKOPF. TALKING MACHINE TONE ARM. APPLICATION FILED SEPT. 9, 1916. 1,257,939. Patented Feb. 26,1918. 2 SHEETS-SHEET 2. zz … UNITED STATES PATENT OFFICE. ARTHUR E. SCHWARZKOPF. OF MUSKEGON, MICHIGAN, ASSIGNOR TO THE BRTJNSWICK-BALKE-COLLENDER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELA- \7ARE TALKING-MACHINE TONE-ARM. 1,257,939. Specification of Letters Patent. Patented Feb. 26, 1918. Application filed September…
Phonograph · Patents
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