| All Patents in class 470/77 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 635,272 | Oct. 17, 1899 | E.H. Williams | Screw Cutting Tool |
| | 863,515 | Aug. 13, 1907 | J.O. Dixon | Screw Threading Machine |
 | 1,114,629 | Oct. 20, 1914 | W. Murchey | Device for cutting screw-threads |
 | 1,255,223 | Feb. 05, 1918 | A.J. Prance | Screw-cutting die |
 | 1,318,519 | Oct. 14, 1919 | C.F. Williams | Thread-cutting machine |
| | 1,345,709 | Jul. 06, 1920 | A.A. Shafer | Threading Die Mechanism |
| | 1,603,280 | Oct. 19, 1926 | L.S. Hall | Die Head for Threading Machines and the Like |
 | 1,758,973 | May 20, 1930 | C. Rasmussen | Pipe-threading machine |
| | 2,017,764 | Oct. 15, 1935 | S.W. Mathias | Threading Machine |
| | 2,583,094 | Jan. 22, 1952 | A. Girz | Taper threading machine |
