United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 197
herecording surface an amount of eneigy sub-stantially equivalent to that lost in the cut-ting operation on a movement of the stylustoward the recording surface equal in ampli- tude to the first mentioned movement, sub-stantially as set forth. This specification signed and witnessedthis 20th day of… … ^itvtesaca
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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