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All Patents in class 408/155
Patents 1 - 5 of 5
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
  428,803May 27, 1890P.T. CoffieldTap
  509,039Nov. 21, 1893L. KirchenbauerBolt Threader
1,100,984Jun. 23, 1914W. MurcheyScrew-cutting tap
  1,127,121Feb. 02, 1915V.J. WahlstromExpanding reamer
  2,035,285Mar. 24, 1936W.R. VosperThread Cutting Tool
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