United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 24
face composed of a material softened by amoderate heat artificiallj^ applied theretoand subsequently hardened by the cooling ef-fect of an ordinary atmospheric temperature,said tubular tablet adapted to be expandedfor use upon the cylinder of a phonographand at other times preserved in a collapsed… … WITNESSES: INVENTORhU ATTORNET (No Model.)
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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