United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 421
n testimony, that I claim the foregoingas my invention, I have signed my name this15th dav of May, 1917. JOSEPH W. JONES. Copies of this patent may be obtained for five cents each, by addressing the Washington, D. C. Commissioner of Patents. {UrtA.^humuwit, r,Hi £,w 1 ; a , ^ o <r ,<*oi7… … INVENTOR . BY <
Phonograph · Patents
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