United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 588
Patented May 29, 1900. No. 650,431. G. H. STEVENS. PROCESS OF DUPLICATING PHONOGRAMS. (Application filed Feb. 2, 1899.) (No Model.) … inventor; WITNESSES: jQ^a^ol-^. ^a/il 6, A^ 6t^^. ■ETERS CO.. PHOTO.U1THO.. WASHINGTON, I
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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