| All Patents in class 76/117 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 82,118 | Sep. 15, 1868 | A. Hoermann | Die for Cutting Screws | taps and dies |
| 153,804 | Aug. 04, 1874 | H.E. Boyd | Lathe Attachments for Cutting Screw Taps | metal lathe accessories and attachments |
| 168,349 | Oct. 05, 1875 | J.C. Sherman | Improvement in screw-cutting dies | taps and dies |
| 269,153 | Dec. 12, 1882 | F. Armstrong | Thread Cutting Die | taps and dies |
| 300,604 | Jun. 17, 1884 | W.C. Hartmann | Die Stock | tap wrenches and die stocks |
| 422,024 | Feb. 25, 1890 | A.B. Landis | Screw-cutting head | screw machines |
| 441,603 | Nov. 25, 1890 | S. Tideman | Die and Die Stock | tap wrenches and die stocks |
| 565,746 | Aug. 11, 1896 | J. Hartness | Screw Cutting Die | taps and dies |
| 707,233 | Aug. 19, 1902 | C.J. Jackson | Screw-cutting die | taps and dies |
| 832,380 | Oct. 02, 1906 | J. Hartness | Tap and Process of Making the Same | taps and dies |
| 863,515 | Aug. 13, 1907 | J.O. Dixon | Screw Threading Machine | metal threading machines |
| 1,048,921 | Dec. 31, 1912 | F.E. Wells | Die-blank | taps and dies |
| 1,273,904 | Jul. 30, 1918 | F. Müller | Tap Making Machine | |
| 1,395,252 | Nov. 01, 1921 | E.E. Beck | Thread Cutting Die | taps and dies |
| 1,545,749 | Jul. 14, 1925 | R.E. Flanders | Method of Making Chasers | thread chasers |
