Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7172021 | Liner hanger with sliding sleeve valve | David Paul Brisco, Edwin Zwald, Chan Daigle, Gregory Marshall Noel, William J. Dean +6 more | 2007-02-06 |
| 6976541 | Liner hanger with sliding sleeve valve | David Paul Brisco, Edwin Zwald, Chan Daigle, Gregory Marshall Noel, William J. Dean +6 more | 2005-12-20 |