Inventor's manual, how to work a patent to make it pay; a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary (1918)

Hopkins, George M. (George Milton), 1842-1902, Hopkins, Albert A. (Albert Allis), 1869-1939, ed · New York, The Norman W. Henley publishing company · leaf 150

An illustration from Inventor's manual, how to work a patent to make it pay; a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary, 1918, leaf 150 — INVENTOR Edwin T. Britten JL /h^yyy^tci<> 1,223,110. H. REIN & J. R. COMBS. DOOR LOCK. APPLICATION HIED MAY 18, 1916. Patented Apr. 17,1917. 2 SHEETS-SHEET I.

Patents · Inventions

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More pictures from Inventor's manual, how to work a patent to make it pay; a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary

Inventor's manual, how to work a patent to make it pay; a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary (1918)

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