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All Patents in class 451/216
Patents 1 - 10 of 22
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PictureNumberDatePatenteeTitle
6,949Dec. 11, 1849J. Vaughan, Jr.Machine for Grinding or Polishing Tools
197,711Nov. 27, 1877E.J. WorcesterImprovement in machines for grinding lawn-motor cutter
248,744Oct. 25, 1881B. HolmesMachine for grinding steel bars
  286,663Oct. 16, 1883H.F. WheelerGrinding Machine for Producing the Relief on Twist and Fluted Drills
  299,433May 27, 1884A. Coventry, W.F. SmithMachinery for Grinding or Sharpening Drills
  364,353Jun. 07, 1887R. KampfeMachinery for Grinding Cutlery
  607,628Jul. 19, 1898F.A. Shea, Administrator, M. Reece, administrator, J. Reece, Estate of (deceased)Machine for Foming Irregular Cam Grooves
1,515,568Nov. 11, 1924R.W. Ellingham, G.W. FlemingGrinding machine
  1,666,500Apr. 17, 1928N.I. LundbergMetal Working Tool
  1,794,271Feb. 24, 1931H.H. AsbridgeGrinding machine
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