United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 737
INVENTOR UNITED STATES PATENT OFFICE, WILLIAM C. HELLER, OF MONTPELIER, OHIO.CABINET FOE, PHONOGRAPH-RECORDS. 1,262,789. Specification of Letters Patent. Patented Apr. 16, 1918. Application filed February 24,1917. Serial No. 150,640. To all whom it may concern: Be it known that I, William C.…
Phonograph · Patents
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