| All Patents in class 408/74 |
Patents 1 -
10
of 19
      |
| Picture | Number | Date | Patentee | Title |
| | 417,574 | Dec. 17, 1889 | K. Mischke | Screw Cutting Tool |
| | 427,903 | May 13, 1890 | W. Porteous | Automatic Screw Cutting Die |
| | 453,811 | Jun. 09, 1891 | W. Hutcheson | Screw Cutting Tool |
| | 564,700 | Jul. 28, 1896 | H. Kupsch | Open Die Head |
| | 630,712 | Aug. 08, 1899 | C.A. Johnson | Tool for Cutting Screw Threads |
| | 637,133 | Nov. 14, 1899 | H. Kupsch | Open Die Head |
| | 640,596 | Jan. 02, 1900 | F.H. Stahl | Automatic Adjustable Die |
| | 642,309 | Jan. 30, 1900 | F.A. Errington | Automatically Opening or Closing Die for Cutting Screw Threads, &c. |
| | 642,312 | Jan. 30, 1900 | F.A. Errington | Automatically Opening or Closing Die |
| | 649,733 | May 15, 1900 | J.P. Lavigne | Die Head |
