United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 477
^^^^^^^^^^^^ gJrvutftitoT H … UNITED STATES PATENT OFFICE. DONATO DI CARLO, OF PHILADELPHIA, PENNSYLVANIA. SPRING-CONTROLLED NOISELESS MOTOR FOR OPERATING TALKING AND OTHER MACHINES. 1,258,753. Specification of Letters Patent. Patented Mar. 12, 1918. Application filed June 26,1917. Serial No. 176,950. To all whom it may…
Phonograph · Patents
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