All Patents in class 91/342


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All Patents in class 91/342
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	6,589	Jul. 10, 1849	R. Porter	Arrangement and method of working the valves of auxiliary engines for feeding boilers
	385,580	Jul. 03, 1888	G.B. Snow	Steam Bell Ringer