United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 358
A. N. PIERMAN. SODND REPRODUCER, APPLICATION FILED SEPT. 13, 1909. 1,024,696. Patented Apr. 30, 1912. 3 SHEETS-SHEET 2. … COLUMBIA PLANOGRAPH CO.. WASHINGTON, D. C.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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