| All Patents in class 408/172 |
Patents 1 -
10
of 16
      |
| Picture | Number | Date | Patentee | Title |
| | 434,898 | Aug. 19, 1890 | J.C. Williams | Machine for Cutting Threads on Bolts |
| | 454,197 | Jun. 16, 1891 | H.L. Ament, E. Ament | Screw Thread Cutting Machine |
| | 581,187 | Apr. 20, 1897 | F.E. Wells, W.C. Wells | Machine for Making Nipples and Stud Bolts |
 | 1,057,014 | Mar. 25, 1913 | O.A. Smith | Die |
 | 1,114,629 | Oct. 20, 1914 | W. Murchey | Device for cutting screw-threads |
| | 1,251,527 | Jan. 01, 1918 | S. Hough | Adustable & Improved Cutting Head for Boring Out Shells |
| | 1,560,462 | Nov. 03, 1925 | R.A. Boehm | Self Opening and Closing Threading Die Holder |
 | 1,563,108 | Nov. 24, 1925 | A.J. Prance | Thread-cutting die |
| | 1,603,605 | Oct. 19, 1926 | C. Jobst | Die Head for Thread Cutting Tools |
 | 1,655,563 | Jan. 10, 1928 | A.J. Prance | Thread-cutting die |
