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Patents for Henry Francis
Patents 1 - 3 of 3
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PictureNumberDatePatenteeTitle
16,470Jan. 27, 1857G.N. CummingsClamp for Soldering Glasses
  1,278,629Sep. 10, 1918H. FrancisMilling and the Like Cutter
  1,434,995Nov. 07, 1922H. FrancisCutting or Boring Tool or Boring Head
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