United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 813
, this 5th day of April,A. D., 1916. LOUIS MENGE. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. \\jrn.ii.irn\jm\jriZi rniPjiu; J., ou**,£>j.;7 SOUND REPRODUCING DIAPHRAGM AND PROCESS OF MAKING THE SAME, 1,364,219 J. A.… … c^yv £. I ■ ■. . ■-■jU j ; WM1MM! WM»aiaM.^7/y^^ ,* /71 LvQ.&
Phonograph · Patents
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