| All Patents in class 470/198 |
Patents 1 -
15
of 44
      |
| Number | Date | Patentee | Title | Type |
| 21,960 | Nov. 02, 1858 | W.O. Hickok | Tap for Cutting Wooden Screws | drill bits |
| 54,096 | Apr. 24, 1866 | B.F. Bee | Improved screw-tap | taps and dies |
| 129,376 | Jul. 16, 1872 | W. Tucker | Improvement in Screw Taps | taps and dies |
| 133,527 | Dec. 03, 1872 | A.E. Goddard, A. Goddard | Machines for Threading Screw Taps | metal threading machines |
| 139,651 | Jun. 10, 1873 | A.E. Barthel | Taps and Dies | taps and dies |
| 166,318 | Aug. 03, 1875 | J.E. Sweet | Screw Taps | taps and dies |
| 224,921 | Feb. 24, 1880 | W. Kenworthy | Tap | taps and dies |
| 228,882 | Jun. 15, 1880 | T.A. Fleming | Screw Tap | taps and dies |
| 379,213 | Mar. 13, 1888 | I. Tompkins, A. Tompkins, E. Firth | Screw Tap | taps and dies |
| 412,952 | Oct. 15, 1889 | C. Elterich | Tap and holder therefor | taps and dies |
| 414,357 | Nov. 05, 1889 | J.E. Woodbridge | Screw Cutting Tool | taps and dies |
| 422,024 | Feb. 25, 1890 | A.B. Landis | Screw-cutting head | screw machines |
| 461,800 | Oct. 20, 1891 | H.B. Pullman | Tapping Device | tap and die holders |
| 466,946 | Jan. 12, 1892 | D.J. Hurley | Tapping Device | tap and die holders |
| 559,372 | May 05, 1896 | C. Elterich | Tap | taps and dies |
