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Patents for Frank M. Underwood
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
274,099Mar. 20, 1883J. Ackerman, A.O. Mitchell, F.M. UnderwoodSaw-mill dogsawmill dogs
306,038Sep. 30, 1884F.M. UnderwoodSaw-mill dogsawmill dogs
542,743Jul. 16, 1895F.M. UnderwoodCylinder Head for Gas or Gasoline Enginesinternal combustion engines
553,181Jan. 14, 1896F.M. UnderwoodSparker for Gas and Gasoline Enginesignition systems
574,183Dec. 29, 1896F.M. UnderwoodMixer for Gas Enginescarburetors
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