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Patents for Thompson Grinder Co.
Patents 1 - 10 of 89
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PictureNumberDatePatenteeTitle
  1,978,181Oct. 23, 1934J.R. WhittlesHydraulically driven surface grinding machine
  2,068,529Jan. 19, 1937W.G. BaldenhoferGrinding Machine
  2,113,287Apr. 05, 1938W.G. BaldenhoferMachine for Grinding and Sharpening Broaches
2,138,811Dec. 06, 1938P.A. AbeSurface Hardening Lathe Bed
  2,154,947Apr. 18, 1939H.H. Beeny, A.H. LloydHardening Metal Surfaces
2,157,948May 09, 1939H.H. BeenyHardening of Metal Surfaces
  2,216,308Oct. 01, 1940E.C. BallmanMethod and Means for Balancing Grinding Wheels
  2,216,800Oct. 08, 1940W.G. BaldenhoferHydraulic Control Device
2,231,233Feb. 11, 1941H. VienhausProcess of finishing materials
  2,252,877Aug. 19, 1941C. BaldenhoferWay Grinding Machine
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