United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 752
carried thereby and arranged toact on the same side of the blank, said pointsbeing arranged at different distances fromthe center of the diaphragm, whereby the Zkpoints will form, or trace over, two separateforth^^^ i-ecords, substantially as set This specification signed and witnessed this1st day…
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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