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Patents Granted on 1817-07-31
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,817XJul. 31, 1817J. LuptonAngular ploughplows
2,818XJul. 31, 1817S.A. RogersImprovement on Dearborn's balance
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