United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 551
J. JOHNSON. PHONOGRAPH. APPLICATION FILED APR. 25, 1914. 1,145,146. Patented July 6, 1915. 2 SHEETS-SHEET 2. I I Id) £7 … (ci_i.v.b;* pl>noop«f^ ccvashinoton. o. c. UNITED STATES PATENT OFFICE. JOHN JOHNSON, OF OLONGAPO, PHILIPPINE ISLANDS.PHONOGRAPH. 1,145,146. Specification of Letters Patent. Patented July 6, 1915. Application filed April 25,1914. Serial No. 834,482. To all whom it may concern: Be it known that…
Phonograph · Patents
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