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Patents Granted on 1820-05-??
Patents 1 - 7 of 7
First set of recordsLast set of records
NumberDatePatenteeTitleType
FX-3,200May 03, 1820N. WinslowCooking stovestoves
3,200XMay 03, 1820J. Butters, E. HowardMachine for splitting leathersplitting and shearing machinery
3,201XMay 03, 1820I.L. SkinnerMachine for excavating canals
3,202XMay 04, 1820S. KeplingerMachine for making watch chainschain making machines
3,203XMay 08, 1820N. ReadCorn cracker, or hominy millmiller
FX-3,203May 17, 1820S. IvesMachine for making candle wickcandle making machinery
3,205XMay 24, 1820S. HowardImproved mode of towing boatsnautical propulsion apparatus
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