| All Patents in class 408/218 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 5,103 | May 08, 1847 | P.W. Gates | Screw Cutting Die | taps and dies |
| 166,318 | Aug. 03, 1875 | J.E. Sweet | Screw Taps | taps and dies |
| 216,023 | Jun. 03, 1879 | R.T. Crane | Improvement in Boring and Reaming Tools | tapered reamers |
| 279,360 | Jun. 12, 1883 | J.W. Douglas | Combined Drill or Reamer, Tap and Socket | taps and dies |
| 588,056 | Aug. 10, 1897 | F.G. Echols | Screw Cutting Tool | |
| 1,613,577 | Jan. 04, 1927 | J.C. Fletcher | Die Cutting Machine | |
| 1,953,528 | Apr. 03, 1934 | E.T. Bysshe, R.R. Finn | Chaser | thread chasers |
