United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 789
g diaphragms, fortalking-machines, consisting in immersingporous material in a filling bath, in com-pressing such filled material between hard 35plates having openings therein arranged andadapted to afford room for the expansion ofsuch portion of the material as is adjacentto such openings, and in… … l/lmnass ebz JniTEutor. H^ NOattiS PETERS CO . V/A^HIftCTCH. O. C 976,502. A. F. SCHdNWETTER. PHONOGRAPH SOUND BOX.APPLIOATIOH FILED JAH. 7, 1910. Patented Nov. 22,1910. ^^onr 2 SHEETS-SHEET 2.
Phonograph · Patents
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