United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 269
£Iffor. J. C. DRAKE. MODULATOR FOR SOUND PRODUCING MACHINES. APPLICATION FILED JUNE 6, 1 9 t 6. 1,254,665. Patented Jan. 29,1918. 2 SHEETS-SHEET 2. … flttoi tteij (JMTED STATES PATENT OFFICE. JAMES C. DRAKE, OF ROCHESTER, MINNESOTA, ASSIGNOR TO SEARS, ROEBUCK & COM-PANY, OE CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK. MODULATOR FOR SOUND-PRODUCING MACHINES. 1,254,665. Specification of Letters Patent. Patented Jan. 29, 1918. Application…
Phonograph · Patents
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