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All Patents in class 451/528
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	494,471	Mar. 28, 1893	F.N. Gardner, C.H. Besly	Grinding or polishing wheel and the art of manufacturing same
	494,472	Mar. 28, 1893	F.N. Gardner, C.H. Besly	Grinding or polishing wheel and the art of manufacturing same
	2,073,167	Mar. 09, 1937	H.L. Myers	Surface cleaning means

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