Issued Patents All Time
Showing 1–3 of 3 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, Akindele Olufowoshe +2 more | 2010-11-02 |
| 7779923 | Methods and apparatus for anchoring and expanding tubular members | Gregory Marshall Noel, Edwin Zwald | 2010-08-24 |
| 6044040 | Wide-azimuth, radially-directed seismic data acquisition method | — | 2000-03-28 |