All Patents in class 137/517


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All Patents in class 137/517
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	266,462	Oct. 24, 1882	H. Hobbs, E.F. Gordon	Vent-valve
	861,714	Jul. 30, 1907	H.C. Dudgeon	Hydraulic jack
	1,298,068	Mar. 25, 1919	B.T. McCanna, E.R. Klemm	Gas-engine governor and auxiliary air-inlet
	1,597,729	Aug. 31, 1926	W.W. Schettler	Safety Device for Preventing Passage of Flame