United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 235
m, revolvingthe matrix, film and material at a speedsufficient to imprint the matrix in the filmby centrifugal action, permitting the trapped 75air between the matrix and film to escapeand removing the finished phonogram. In testimony whereof I have affixed mysignature in presence of two witnesses.… … J9 f J^ jk
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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