All Patents in class 266/130


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All Patents in class 266/130
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,333,767	Mar. 16, 1920	C. Napier	Method of making tempered blades
	2,247,494	Jul. 01, 1941	A.L. Hartley	Flame hardening apparatus
	2,264,752	Dec. 02, 1941	W.F. Groene	Flame Hardening Machine