| All Patents in class 409/74 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 230,825 | Aug. 03, 1880 | I.S. Schuyler | Machine for Cutting Screw Threads | metal threading machines |
| 471,194 | Mar. 22, 1892 | C. Rosine | Automatic Screw Cutting Machine | screw machines |
| 977,540 | Dec. 06, 1910 | H.W. Oster | Thread-cutting mechanism | pipe threading machines |
| 1,047,280 | Dec. 17, 1912 | H.W. Oster | Thread-cutting mechanism | pipe threading machines |
| 1,613,577 | Jan. 04, 1927 | J.C. Fletcher | Die Cutting Machine | |
| 2,382,662 | Aug. 14, 1945 | A.J. Prance | Thread milling machine | tapping machines |
| 2,596,723 | May 13, 1952 | H.H. Ranney | Thread-cutting Mechanism | metalworking machine mechanisms |
