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All Patents in class 91/216R
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	2,027,706	Jan. 14, 1936	L.L. Schauer, J.H. McKewen	Counterbalance valve
	2,383,429	Aug. 21, 1945	G.A. Wahlmark	Hydraulically operated control mechanism
	2,656,681	Oct. 27, 1953	G.J. Peterson	Variable stroke power actuator
	2,882,760	Apr. 21, 1959	L.A. Leifer	Infinitey Variable Incremental Feed Control

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