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Patents Granted on 1821-11-17
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
3,406XNov. 17, 1821O. PhelpsElastic floor for propelling boatsnautical propulsion apparatus
3,407XNov. 17, 1821G. Moorehouse, O. PhelpsPloughplows
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