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All Patents in class 451/148
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,612,830	Jan. 04, 1927	C.G. Olson	Grinding machine
	2,374,258	Apr. 24, 1945	G. Davenport	Infeed Control for Worm Gear Hobbing Machines

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