Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7107875 | Methods and apparatus for connecting tubulars while drilling | David M. Haugen | 2006-09-19 |
| 7028787 | Tong for wellbore operations | John Timothy Allen, Steven Anthony Box, Bernd-Georg Pietras | 2006-04-18 |
| 6668684 | Tong for wellbore operations | John Timothy Allen, Steven Anthony Box, Bernd-Georg Pietras | 2003-12-30 |
| 6412554 | Wellbore circulation system | John Timothy Allen, Steven Anthony Box, Bernd-Georg Pietras | 2002-07-02 |