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All Patents in class 92/137
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	2,895	Dec. 31, 1842	W. Douglas, B. Douglas	Pump
	275,800	Apr. 17, 1883	G. Clark	Steam-feed works for saw-mills
	588,062	Aug. 10, 1897	H.C. Hart	Gas Engine
	623,224	Apr. 18, 1899	E.j. Stoddard	Gas Motor Engine
	1,364,823	Jan. 04, 1921	J.J. Aull	Gas Engine Primer

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