United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 509
INVENTOR ATTORN EYii titwiw i Q»(.-.H<iM cu pifOTo.LfTHoctui«a» 7.iv««ira« o c. A. G. KAUFMAN. SOUND HOEN. APPLIOATION FILED FEB,26, 1907. 962,574. Patented June 28,1910. 2 SHEETS-SHEET 2.
Phonograph · Patents
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