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All Patents in class 254/93A
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,395,340	Nov. 01, 1921	F.L. Gormley	Speed Retarding Device for Lifting Jacks
	2,831,551	Apr. 22, 1958	W.A. Ross, I.A. Weaver	Safety device for lifting jacks

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