Issued Patents 2004
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6823937 | Wellhead | David Paul Brisco, R. Bruce Stewart, Lev Ring, Richard Carl Haut, Robert Donald Mack | 2004-11-30 |
| 6801336 | System and method for producing halftoned color separations for an output imaging device | Dave Hylands, Daniel J. Blondal | 2004-10-05 |
| 6758278 | Forming a wellbore casing while simultaneously drilling a wellbore | David Paul Brisco, Lev Ring, Michael Bullock | 2004-07-06 |
| 6745845 | Isolation of subterranean zones | Lev Ring, Kevin Waddell, David Paul Brisco | 2004-06-08 |
| 6739392 | Forming a wellbore casing while simultaneously drilling a wellbore | R. Bruce Stewart, Lev Ring | 2004-05-25 |
| 6725919 | Forming a wellbore casing while simultaneously drilling a wellbore | David Paul Brisco, Lev Ring, Michael Bullock | 2004-04-27 |
| 6712154 | Isolation of subterranean zones | Michael Bullock | 2004-03-30 |
| 6705395 | Wellbore casing | David Paul Brisco, Lev Ring, Michael Bullock | 2004-03-16 |
| 6684947 | Apparatus for radially expanding a tubular member | David Paul Brisco, Lev Ring, Michael Bullock | 2004-02-03 |