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All Patents in class 451/117
Patents 46 - 60 of 64
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NumberDatePatenteeTitleType
1,425,684Aug. 15, 1922T.A. ParmenterValve Grinding Tool and the Likevalve grinding tools
1,441,032Jan. 02, 1923J.W. SchabValve Grindervalve grinding tools
1,450,788Apr. 03, 1923W.S. BellowsValve Grinding Toolvalve grinding tools
1,468,055Sep. 18, 1923W.I. TuttleValve-Grinding Apparatusvalve grinding tools
1,471,769Oct. 23, 1923C.H. BeachValve Grindervalve reseating machines
1,475,153Nov. 20, 1923H. AthenasPortable electric combination drillhandheld power drills
1,503,206Jul. 29, 1924A.W. OjerholmCombination valve grinder and drillvalve and seat maintenance
1,518,579Dec. 09, 1924O.D. HapgoodValve-grinding tool
1,553,871Sep. 15, 1925D.W. MeansValve Grinding Toolvalve grinding tools
1,564,017Dec. 01, 1925J.C. PewtherValve Grindervalve grinding tools
1,591,400Jul. 06, 1926J. OrawiecValve Grinding Toolvalve grinding tools
1,707,572Apr. 02, 1929L.G. RollerValve Grindervalve grinding tools
1,709,428Apr. 16, 1929J.H. CarpenterValve grinderhandheld power tools
1,749,300Mar. 04, 1930W.H. Odlum, E.H. PetersonValve grinder
1,808,856Jun. 09, 1931F.W. MillerValve Grindervalve grinding tools
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