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All Patents in class 428/586
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
2,359,477	Oct. 03, 1944	J.H. Hoern	Method of Making Hollow Head Valves	internal combustion engine valves
2,456,856	Dec. 21, 1948	C.J. Bath	Bolster Block	metal bending machines

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