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All Patents in class 251/66
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	2,091,228	Aug. 24, 1937	A.G. Hann	Control Device
	2,240,763	May 06, 1941	E.J. Dillman	Control System
	2,406,228	Aug. 20, 1946	W.S. Landon	Burner Control Means

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