All Patents in class 219/618


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All Patents in class 219/618
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,226,446	Dec. 24, 1940	A. Allen, G. Smith	Process for treating thermoplastic products
	2,361,995	Nov. 07, 1944	F.W. Curtis	Method of Making Metal Cutting Tools