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All Patents in class 239/132.3
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
2,247,494	Jul. 01, 1941	A.L. Hartley	Flame hardening apparatus	flame hardening machines
2,621,717	Dec. 16, 1952	M. Garvin, D.M. Strauchen	Annular Torch Head for Flame Hardening Machines	flame hardening machines

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