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Patents for D. P. Cowl
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	125,695	Apr. 16, 1872	R.S. Sanborn	Improvement in Wrenches
	195,993	Oct. 09, 1877	M.L. Edwards	Metal Drilling Machine
	216,776	Jun. 24, 1879	Q.S. Backus	Bit-stock wrenches
	231,344	Aug. 17, 1880	J.H. Needles	Combined apparatus for producing illuminating gas and generating steam
	310,774	Jan. 13, 1885	D.L. Ballard	Reversing Gear for Shaping Machines

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