All Patents in class 451/197


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All Patents in class 451/197
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	1,722,386	Jul. 30, 1929	C.H. Norton	Centerless Grinding Machine
	1,722,387	Jul. 30, 1929	C.H. Norton	Centerless Grinding Machine
	1,722,388	Jul. 30, 1929	C.H. Norton	Method of Grinding Small Cylindrical Objects
	1,782,480	Nov. 25, 1930	E.R. Seward	Centerless Grinding Machine
	1,919,144	Jul. 18, 1933	C. Booth	Grinding Machine