United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 895
ic, single tone, rec-ords of different instruments, tones of onescale being reproducible in unison withtones of another scale and means for bringingthe different series of records into operation 60simultaneously or individually. In testimony whereof we affix our signa-ture, in presence of two… … WITNESSES:
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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