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All Patents in class 60/794
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	34,333	Feb. 04, 1862	S.H. Roper	Hot Air Engine
	269,146	Dec. 12, 1882	H. Wiedling	Gas Engine
	666,368	Jan. 22, 1901	H.F. Wallman	Internal Combustion Engine

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