| All Patents in class 408/154 |
Patents 1 -
10
of 36
      |
| Picture | Number | Date | Patentee | Title |
| | 189,889 | Apr. 24, 1877 | J.B. Douglas | Expanding Screw Tap |
| | 378,310 | Feb. 21, 1888 | J.T. Hayden | Collapsing Tap |
| | 419,174 | Jan. 14, 1890 | J.A. Becher | Revolving Turret Bolt Threading Machine |
| | 427,903 | May 13, 1890 | W. Porteous | Automatic Screw Cutting Die |
| | 453,811 | Jun. 09, 1891 | W. Hutcheson | Screw Cutting Tool |
| | 578,802 | Mar. 16, 1897 | G.E. Witherell | Thread Cutter |
| | 587,715 | Aug. 10, 1897 | F.A. Errington | Automatic Extensible and Collapsible Adjustable Tap |
| | 626,385 | Jun. 06, 1899 | A. Johnson | Tap |
| | 644,748 | Mar. 06, 1900 | C.A. Svensson | Screw Tap |
 | 740,016 | Sep. 29, 1903 | L.A. Howe | Self-opening die |
