United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 129
T jt&iz … Tni/ejvtor* UNITED STATES PATENT OFFICE. DAVID 0. ROYSTER, OF ST. LOUIS, MISSOURI.COMBINED MOTION-PICTURE APPARATUS AND PHONOGRAPH. 1,252,304. Specification of Letters Patent. Patented Jan. 1, 1918. Application filed July 15,1912. Serial Wo. 709,399. To all whom it may concern: Be it known that I,…
Phonograph · Patents
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