United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 393
^\Xw<i^iy^^ … aooMAaco »«TO.iJT»oo«»»»o« WASMHQTOH ft C UNITED STATES PATENT OFFICE. LEE B. PURCELL. OP THE UNITED STATES MARINE CORPS. MEGAPHONE. 958,680. Specification of letters Patent. Patented May 17, 1910. Application filed November 16, 1909. Serial No. 528,406. To all whom it may concern: Be it known that…
Phonograph · Patents
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