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Patents for Robert H. Clark
Patents 1 - 3 of 3
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PictureNumberDatePatenteeTitle
2,385,902Oct. 02, 1945H.C. WilsonFixture for grinding thread-cutting tools
  2,405,686Aug. 13, 1946R.H. ClarkMachine Tool
  2,528,299Oct. 31, 1950R.H. ClarkMachine Tool
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