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Patents for Samuel Hopkins
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1XJul. 31, 1790S. HopkinsMaking Pot And Pearl Ashesmanufacturing potash
1,985XAug. 19, 1813S. HopkinsPreparation of flour of mustard
2,797XMay 31, 1817S. HopkinsPreparation of the flour of mustard
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