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All Patents in class 251/31
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	2,286,880	Jun. 16, 1942	W.A. Traut	Hydraulic Control System
	2,618,244	Nov. 18, 1952	E.G. Roehm	Pilot Valve Controlled Tracer Valve
	2,635,847	Apr. 21, 1953	F.H. Rued	Turbine Jet Controller

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