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All Patents in class 451/402
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	39,317	Jul. 21, 1863	J. Dodge	Improvement in machines for grinding and polishing cutlery
	810,426	Jan. 23, 1906	R.L. Morgan, J.N. Heald	Grinding-machine
	1,096,188	May 12, 1914	C.H. Norton	Apparatus for grinding rolls
	2,138,264	Nov. 29, 1938	A.L. Warner	Work holder for mower sections

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