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All Patents in class 261/8
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	245,776	Aug. 16, 1881	B. Brazelle	Feed-water heater and purifier
	981,188	Jan. 10, 1911	F.G. Hobart, W.W. Gore	Gas Cleaning Apparatus

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