All Patents in class 51/301


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All Patents in class 51/301
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	5,535	Apr. 25, 1848	J.G. Isham	Improvement in sand-paper
	94,955	Sep. 21, 1869	R.J. Costain, N.B. Hadley	Improved compound for emery-wheels and oil-stones
	608,877	Aug. 09, 1898	D.J. Lattimore	Abrading-wheel