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All Patents in class 91/177
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	103,212	May 17, 1870	H.E. Long	Rotary Steam Engine
	128,062	Jun. 18, 1872	C.W. Patten	Improvment in Rotary Steam-Engines
	403,714	May 21, 1889	R.T. Abell	Steam Engine

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