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All Patents in class 251/310
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	139,096	May 20, 1873	E. Ware	Steam Engine Governor-Valves
	596,639	Jan. 04, 1898	W.W. Tucker	Oil-cup
	2,972,357	Feb. 21, 1961	C.S. Gladoske, R.L. Ford	Hydraulic Rotary Selector Valve

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