All Patents in class 451/198


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All Patents in class 451/198
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,722,388	Jul. 30, 1929	C.H. Norton	Method of Grinding Small Cylindrical Objects
	1,919,144	Jul. 18, 1933	C. Booth	Grinding Machine
	5,245,789	Sep. 21, 1993	S.C. Rees, D.S. Pusateri	Knife sharpener