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Patents Granted on 1845-12-20
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
4,317Dec. 20, 1845J. EricssonCompound Steam Enginesteam engines
4,321Dec. 20, 1845C.B. RogersMachinery for dressing combscomb making machines
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