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All Patents in class 451/457
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,372,033	Mar. 22, 1921	W.A. Marschke, F.W. Marschke	Grinder-hood
	1,406,914	Feb. 14, 1922	V.A. Virgilio	Adjustable safety guard for emery wheels
	1,539,829	Jun. 02, 1925	F.L. Cole	Guard and work-rest mounting

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