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All Patents in class 122/442
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	278,196	May 22, 1883	E.R. Stilwell	Feed-water heater
	1,828,633	Oct. 20, 1931	C.D. Allen, F.W. Walch, B.T. Williston	Injector for Feeding Water to Steam Boilers
	1,944,080	Jan. 16, 1934	J.N. Gresham, H.E. Gresham	Feed Water Heater of the Injector Type

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