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Patents for Harry Samuel Nicholson
Patents 1 - 2 of 2
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PictureNumberDatePatenteeTitle
  1,080,507Dec. 02, 1913J.B. ArmstrongTrap-Valve Mechanism
  1,302,833May 06, 1919W.C. Beiswinger, H.S. NicholsonSteam-Trap
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