United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 479
ng into theside of said box, the upper and lower walls 75of said tube and sound box converging asthey approach the diaphragm and the top ofthe sound box being practically a continua-tion of the upper wall of the tube, substan-tialh as set forth. 80 This specification signed and witnessedthis 11th… … 2 8HEET8-8HEET 1.
Phonograph · Patents
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