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All Patents in class 137/607
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	564,684	Jul. 28, 1896	E.N. Dickerson	Gas Mixing Device
	718,481	Jan. 13, 1903	A. Soames, W. Langdon-Davies	Internal Combustion Engine
	2,381,146	Aug. 07, 1945	A. Von Wangenheim	Water Mixing Valve

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