Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7823659 | Apparatus and methods for drilling and lining a wellbore | Darrell Scott Costa, Kevin Waddell, Edwin Zwald, Charles Butterfield, Mark Holland +2 more | 2010-11-02 |
| 7140428 | Expander for expanding a tubular element | — | 2006-11-28 |
| 7131498 | Expander for expanding a tubular element | — | 2006-11-07 |
| 7117940 | Expander for expanding a tubular element | — | 2006-10-10 |