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All Patents in class 451/270
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
203,934May 21, 1878J.B. Dougherty, P. PitkinStone Polishing Machinestone dressing machines
6,213,851Apr. 10, 2001R.W. Barta, J.E. GarciaAbrading apparatus
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