All Patents in class 451/288


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All Patents in class 451/288
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	228,929	Jun. 15, 1880	C.F. Powers	Tile Facing and Squaring Machine
	2,209,071	Jul. 23, 1940	E.J. Bullard	Grinding and Lapping Machine
	2,565,590	Aug. 28, 1951	E.J. Bullard	Lapping Machine