Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10487626 | Fracturing valve and fracturing tool string | Donald Getzlaf, John Ravensbergen, Douglas James Brunskill | 2019-11-26 |
| 9903182 | Fracturing valve and fracturing tool string | Donald Getzlaf, John Ravensbergen, Douglas James Brunskill | 2018-02-27 |