| All Patents in class 470/75 |
Patents 31 -
41
of 41
      |
| Number | Date | Patentee | Title | Type |
| 599,968 | Mar. 01, 1898 | A.D. Laws | Screw Cutting Device | taps and dies |
| 614,949 | Nov. 29, 1898 | J. Hartness | Screw Cutting Die | taps and dies |
| 649,733 | May 15, 1900 | J.P. Lavigne | Die Head | |
| 841,396 | Jan. 15, 1907 | F.W. Hoefer | Machine for Threading Pipes | pipe threading machines |
| 909,748 | Jan. 12, 1909 | I.W. Sprink, F.L. Brown | Automatic Die Head | tap and die holders |
| 1,221,193 | Apr. 03, 1917 | A.B. Landis | Cutter-head | metal threading machines |
| 1,289,721 | Dec. 31, 1918 | H.L. Fisher | Cutter-head | pipe threading machines |
| 1,327,008 | Jan. 06, 1920 | G.A. Anderson | Cutter-head | pipe threading machines |
| 1,560,462 | Nov. 03, 1925 | R.A. Boehm | Self Opening and Closing Threading Die Holder | tap and die holders |
| 1,655,542 | Jan. 10, 1928 | L.S. Hall | Die head for threading machines and the like | pipe threading machines |
| 1,804,459 | May 12, 1931 | R.R. Finn, E.T. Bysshe | Screw-Cutting Die | tapping heads and chucks |
