United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 361
oseparate boxes placed side by side with asound-tube running longitudinally thereof,each box being provided with a diaphragm,domes secured to said diaphragm, a bridge 45connecting said domes, and a bridge carryinga stylus connected to said first-named bridges,substantially as described. In… … Tiy.%.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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