United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 245
leading from said grating; a noshort connecting-tube having two or moresharp bends between said tube and the trum-pet; and means for actuating said movablegrating in accordance with the sounds to bereproduced, substantially as described. 115 In witness whereof I have hereunto set myhand in presence…
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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