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All Patents in class 33/501.16
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	2,087,957	Jul. 27, 1937	H. Pelphrey	Gear Checking Device
	2,171,589	Sep. 05, 1939	E.W. Miller	Involute Measuring Machine
	2,336,845	Dec. 14, 1943	H.V. Christensen	Checking Device
	2,612,701	Oct. 07, 1952	G.C. Razor	Gear Tooth Lead Testing Device

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