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Patents Granted on 1839-12-__
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
XC-50Dec. 04, 1839W. NunnsCertain new and useful improvements in the construction of steam enginessteam engines
GB-183,908,299Dec. 04, 1839J. NasmythRailway-carriage brakesrailroad car brakes
1,443Dec. 27, 1839H. AikenTool Handletool holders
1,457Dec. 31, 1839M. Andrews, J. SproatManner of relieving the collars of circular saws from the friction occasioned by the article sawedcircular saws
1,458Dec. 31, 1839T.J. ButlerMode of Cutting Seats, Slots, or Grooves for the Reception of Keys in the Hubs and Axles of Car-Wheels and in other Machinerykey seating machines
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