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Patents Granted on 1820-03-??
Patents 1 - 12 of 12
First set of recordsLast set of records
NumberDatePatenteeTitleType
3,177XMar. 03, 1820J.B. Smith, P. MarshallPloughplows
3,178XMar. 06, 1820A. BrewsterImprovement in ship building
3,179XMar. 06, 1820E. GriffithsImprovement in fire places
3,180XMar. 06, 1820T. MusseyHollow or Guttered Grid Ironsfireplace tools
3,181XMar. 08, 1820H. BronsonWind power pumppumps
3,182XMar. 16, 1820M.M. DuplatConstruction of privies
3,183XMar. 16, 1820R. Eastman, J. JaquithCircular saw for making clap boardsclapboard machines
3,184XMar. 18, 1820J. LambFire hearth for vessels
3,185XMar. 20, 1820P. WilliamsonCoffee Roastercoffee roasters
3,186XMar. 23, 1820S. FraserTobacco presstobacco machinery
3,187XMar. 23, 1820S.F. Hooker (Tooker), I.L. SkinnerApparatus for removing earth in making roads, etc.
3,188XMar. 28, 1820E. BryantFire enginefire engines
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