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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 427
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SZf.3. … €<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. zzPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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