| All Patents in class 408/156 |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 18,003 | Aug. 11, 1857 | A. Weeks | Expanding auger-bit | adjustable drill bits |
| 109,154 | Nov. 08, 1870 | D.F. Sutton | Improvement in Countersinks | countersinks |
| 170,768 | Dec. 07, 1875 | V.J. Reece | Improvement in Screw Cutting Dies | |
| 282,685 | Aug. 07, 1883 | J. Thornton, Jr. | Expanding Reamer | |
| 389,627 | Sep. 18, 1888 | A. Wirsching | Screw Cutting Die | tap wrenches and die stocks |
| 391,161 | Oct. 16, 1888 | H. Kelstad | Tap | |
| 391,510 | Oct. 23, 1888 | J.M. Carpenter | Screw Cutting Die | |
| 437,385 | Sep. 30, 1890 | F.J. Smith | Screw-cutting die | taps and dies |
| 451,448 | May 05, 1891 | E.F. Beugler | Boring Tool | reamers |
| 454,197 | Jun. 16, 1891 | H.L. Ament, E. Ament | Screw Thread Cutting Machine | metal threading machines |
| 462,789 | Nov. 10, 1891 | E.F. Beugler | Expanding Boring Tool | boring bars |
| 530,846 | Dec. 11, 1894 | H.B. Keiper | Screw-cutting plate | |
| 871,451 | Nov. 19, 1907 | A.J. Smart | Screw-cutting die and holder therefor | tap wrenches and die stocks |
| 1,160,042 | Nov. 09, 1915 | J.M. Carpenter | Tool Holder | tool holders |
| 1,214,649 | Feb. 06, 1917 | S.A. Cogsdill | Reamer | reamers |
