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All Patents in class 138/143
Patents 1 - 3 of 3
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
158,786Jan. 19, 1875J.W. DouglasLining pump cylinders
  441,733Dec. 02, 1890E.L. Wyckoff, A. WyckoffComposite tubing
  552,065Dec. 24, 1895J.B. KingBoring Tool
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