Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6823937 | Wellhead | Robert Lance Cook, David Paul Brisco, Lev Ring, Richard Carl Haut, Robert Donald Mack | 2004-11-30 |
| 6739392 | Forming a wellbore casing while simultaneously drilling a wellbore | Robert Lance Cook, Lev Ring | 2004-05-25 |