United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 1197
ir threaded ends terminating in saidhub, a diaphragm mounted in the sound-box so as to cover the screw-heads, and aneedle-holder mounted on the sound-box.CHAKLES P. TRUNDY. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 15… … HIS ATTORNEY UNITED STATES PATENT OFFICE. JOHN FLETCHER, OF DOUGLASTON, NEW YORK, ASSIGNOR TO OPERAPHONE MANUFAC-TURING CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK. SOUND-RECORD. 1,269,696. specification of letters Patent. Patented June 18,1918. Application filed July 3,1915. Serial…
Phonograph · Patents
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