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All Patents in class 451/270
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	203,934	May 21, 1878	J.B. Dougherty, P. Pitkin	Stone Polishing Machine
	6,213,851	Apr. 10, 2001	R.W. Barta, J.E. Garcia	Abrading apparatus

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