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Patents for Dewey Corp.
Patents 1 - 2 of 2
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PictureNumberDatePatenteeTitle
  438,406Oct. 14, 1890M.W. DeweyMethod of Utilizing Electricity in the Forming of Sheet Metal Articles
  438,407Oct. 14, 1890M.W. DeweyApparatus for Forming or Shaping Sheet Metal Electrically
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