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All Patents in class 137/505.42
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	2,152,781	Apr. 04, 1939	D.D. Wile	Control Device
	2,209,216	Jul. 23, 1940	D.D. Wile	Control Device
	2,259,280	Oct. 14, 1941	D.D. Wile	Control Device
	3,132,485	May 12, 1964	J.R. Watson	Hydraulic Motor Control

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