All Patents in class 219/69.15


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All Patents in class 219/69.15
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
2,773,968	Dec. 11, 1956	J.W. Evans, M.E. Martellotti	Electro Discharge Machine	electrical discharge machining
2,778,925	Jan. 22, 1957	H. Gill, J.G. Gross	Electrical Discharge Cutting Machine	electrical discharge machining
2,797,299	Jun. 25, 1957	J.P. Hill	Method of forming serrations at the back of the blade of cutting elements	milling machine cutters