United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 675
c/2tt02?Z &£/. COLUMBIA PLANOORAPH CO., WASHINOTON. D. C. b H. P. ROBERTS. MACHINE FOR SHAVING GRAPHOPHONE BLANKS. APPLICATION FILED JAN. 21, 1911. 1,147,441. Patented July 20,1915. 2 SHEETS—SHEET 2.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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