| All Patents in class 408/172 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 434,898 | Aug. 19, 1890 | J.C. Williams | Machine for Cutting Threads on Bolts | metal threading machines |
| 454,197 | Jun. 16, 1891 | H.L. Ament, E. Ament | Screw Thread Cutting Machine | metal threading machines |
| 581,187 | Apr. 20, 1897 | F.E. Wells, W.C. Wells | Machine for Making Nipples and Stud Bolts | pipe making machines |
| 1,057,014 | Mar. 25, 1913 | O.A. Smith | Die | |
| 1,114,629 | Oct. 20, 1914 | W. Murchey | Device for cutting screw-threads | tapping heads and chucks |
| 1,251,527 | Jan. 01, 1918 | S. Hough | Adustable & Improved Cutting Head for Boring Out Shells | lathe tools |
| 1,560,462 | Nov. 03, 1925 | R.A. Boehm | Self Opening and Closing Threading Die Holder | tap and die holders |
| 1,563,108 | Nov. 24, 1925 | A.J. Prance | Thread-cutting die | tapping heads and chucks |
| 1,603,605 | Oct. 19, 1926 | C. Jobst | Die Head for Thread Cutting Tools | tap and die holders |
| 1,655,563 | Jan. 10, 1928 | A.J. Prance | Thread-cutting die | tapping heads and chucks |
| 1,745,207 | Jan. 28, 1930 | C.C. Koeln, E.E. Davis | Cylinder-reboring machine | cylinder maintenance |
| 1,777,380 | Oct. 07, 1930 | A.J. Prance | Thread-cutting die | tapping heads and chucks |
| 1,823,032 | Sep. 15, 1931 | G.A. De Vlieg | Tool Holder | drilling and boring tool holders |
| 1,936,274 | Nov. 21, 1933 | G.E. Shafer | Die | taps and dies |
| 3,664,755 | May 23, 1972 | L.J. Caras | Finishing Boring Head | boring heads |
