United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 585
QttOitt&V) C. C. KUO. TONE MODULATOR FOR PHONOGRAPHS. APPLICATION FILED NOV. 2, 1916. 1,260,001. Patented Mar. 19,1918. 2 SHEETS-SHEET 2. Fig-ll … (fcr^-* UNITED STATES PATENT OFFICE. CHENG CHIH KTJO, OF ITHACA, NEW YORK.TONE-MODULATOB FOB PHONOGBAPHS. 1,260,001. Specification of Letters Patent. Patented Mar. 19, 1918. Application filed November 2,1916. Serial No. 129,085. To all whom it may concern: Be it known that I, Cheng Chih Kuo,…
Phonograph · Patents
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