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Patents Granted on 1798-05-??
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
GB-179,802,231May 01, 1798T. RowntreeHeating boilers for enginesstationary boilers
GB-179,802,232May 03, 1798J. BramahImprovement in locks for doors, cabinets, &c.door and window hardware
209XMay 18, 1798I. LazellMachine for Removing Rocks, etc.stoneworking
210XMay 31, 1798N.J. Roosevelt, J. SmallmanDouble Steam Enginesteam engines
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