| All Patents in class 408/178 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 180,869 | Aug. 08, 1876 | J. Thomson, E.E. Green | Devices for Cutting Screw Threads | tap and die holders |
| 209,774 | Nov. 12, 1878 | O. Pederson | Screw Cutting Die | taps and dies |
| 564,700 | Jul. 28, 1896 | H. Kupsch | Open Die Head | tap and die holders |
| 587,715 | Aug. 10, 1897 | F.A. Errington | Automatic Extensible and Collapsible Adjustable Tap | taps and dies |
| 1,090,299 | Mar. 17, 1914 | A.M. Harrington, R.F. Scott | Bolt-cutting machine | nut or bolt making machines |
| 1,345,709 | Jul. 06, 1920 | A.A. Shafer | Threading Die Mechanism | tap and die holders |
| 1,345,710 | Jul. 06, 1920 | A.A. Shafer | Collapsible Tap | taps and dies |
| 1,358,074 | Nov. 09, 1920 | W.H. Gates | Die Head | tap and die holders |
| 2,387,294 | Oct. 23, 1945 | H. Davies, C.A. Reimschissel | Thread-Cutting Mechanism | tap and die holders |
| 2,771,798 | Nov. 27, 1956 | H.R. De Vlieg | Grooving or facing head | milling machine cutters |
| 4,162,867 | Jul. 31, 1979 | D.W. Barton, R.A. Rhinefrank, D.J. Calcaterra | Dual Cutter Boring Head | boring heads |
