| All Patents in class 408/74 |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 417,574 | Dec. 17, 1889 | K. Mischke | Screw Cutting Tool | tap and die holders |
| 427,903 | May 13, 1890 | W. Porteous | Automatic Screw Cutting Die | tap and die holders |
| 453,811 | Jun. 09, 1891 | W. Hutcheson | Screw Cutting Tool | tap and die holders |
| 564,700 | Jul. 28, 1896 | H. Kupsch | Open Die Head | tap and die holders |
| 630,712 | Aug. 08, 1899 | C.A. Johnson | Tool for Cutting Screw Threads | taps and dies |
| 637,133 | Nov. 14, 1899 | H. Kupsch | Open Die Head | tap and die holders |
| 640,596 | Jan. 02, 1900 | F.H. Stahl | Automatic Adjustable Die | taps and dies |
| 642,309 | Jan. 30, 1900 | F.A. Errington | Automatically Opening or Closing Die for Cutting Screw Threads, &c. | taps and dies |
| 642,312 | Jan. 30, 1900 | F.A. Errington | Automatically Opening or Closing Die | taps and dies |
| 649,733 | May 15, 1900 | J.P. Lavigne | Die Head | |
| 737,204 | Aug. 25, 1903 | E.W. Bullard | Screw Cutting Device | metal lathe accessories and attachments |
| 909,748 | Jan. 12, 1909 | I.W. Sprink, F.L. Brown | Automatic Die Head | tap and die holders |
| 966,105 | Aug. 02, 1910 | J.P. Lavigne | Automatic die-head | taps and dies |
| 1,114,629 | Oct. 20, 1914 | W. Murchey | Device for cutting screw-threads | tapping heads and chucks |
| 1,456,805 | May 29, 1923 | V.R. Koontz | Die head | taps and dies |
