United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 1227
or opening and closingthe passage. This specification signed and witnessedthis 17th day of January, 1917. PINCUS FARB. Witnesses: Wm. Varin,Herbert W. Weise. 25 Copies of tliis patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C, PHONOGRAPH… … 7£f%
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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