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Patents Granted on 1823-07-16
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
3,726XJul. 16, 1823D. HitchcockPloughplows or ploughs
3,727XJul. 16, 1823J. Thompson (Thomson)Rotary steam enginerotary steam engines
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