United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 710
E. A. HAWTHORNE. SECTIONAL HOEN FOR TALKING MACHINES. APPLICATION PILED JULY 16, 1907. Patented Oct. 5, 1909. 935,980. 2 SHEETS-SHEET 1. ■■:■<-><»*«*•» WAUM&TCM. 0 C
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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