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All Patents in class 91/159
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	309,278	Dec. 16, 1884	C.C. Worthington	Duplex compound engine
	471,253	Mar. 22, 1892	C.T. Noyes, T.W. Heintzelman	Valve Gear for Compound Engines

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