Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8281877 | Method and apparatus for drilling with casing | David Shahin, David M. Haugen, Gary Thompson, Bernd-Georg Pietras, Jimmy L. Hollingsworth +1 more | 2012-10-09 |
| 7509722 | Positioning and spinning device | David Shahin, Jimmy L. Hollingsworth, Bernd Reinholdt | 2009-03-31 |
| 7140445 | Method and apparatus for drilling with casing | David Shahin, David M. Haugen, Gary Thompson, Bernd-Georg Pietras, Jimmy L. Hollingsworth +1 more | 2006-11-28 |