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All Patents in class 219/119
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	453,162	May 26, 1891	E.E. Ries	Apparatus for Hardening and Tempering Steel and Iron
	458,115	Aug. 18, 1891	E. Thomson	Method of Electric Bending and Straightening
	2,778,924	Jan. 22, 1957	J.P. Hill	Apparatus and method for producing flat surfaces

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