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All Patents in class 74/374
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	924,889	Jun. 15, 1909	G. Chedru	Variable Speed Gearing
	1,103,784	Jul. 14, 1914	G.O. Leopold	Change-speed mechanism
	1,185,064	May 30, 1916	F.F. Clarke	Clutch Gearing for Machine Tools

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