All Patents in class 92/207


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All Patents in class 92/207
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	31,303	Feb. 05, 1861	T.S. Davis	Steam Engine Valve
	114,427	May 02, 1871	P. Estes	Improvement in Piston-Packings
	RE6,128	Nov. 10, 1874	T.S. Davis	Piston Packings