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All Patents in class 451/319
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	692,129	Jan. 28, 1902	G.W. Nimon, D.R. Ferguson	Roll Polishing Apparatus
	1,236,408	Aug. 14, 1917	E.J. Dickson	Valve Reamer and Refacer
	2,601,630	Jun. 24, 1952	R.J. Rahn, I.J. Rahn	Angle block and method of manufacture

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