All Patents in class 137/625.48


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All Patents in class 137/625.48
Patents 1 - 8 of 8
Picture	Number	Date	Patentee	Title
	8,283X	Jun. 25, 1834	H. Strait	Construction of valves on the principle of a balance
	391,916	Oct. 30, 1888	C.T. Porter	Steam-engine
	479,273	Jul. 19, 1892	M.E. Hershey	Piston-valve
	1,568,061	Jan. 05, 1926	E.R. Draver	Exhaust cut-out
	1,594,052	Jul. 27, 1926	E.R. Draver	Exhaust cut-out
	1,623,580	Apr. 05, 1927	E.R. Draver	Exhaust cut-out
	1,820,653	Aug. 25, 1931	H. Ernst	Hydraulic Valve
	2,600,746	Jun. 17, 1952	W. Ernst	Fluid Pressure Control Valve