Issued Patents 2022
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11441384 | Tool for metal plugging or sealing of casing | David D. Hearn, Casey Hirschmann, Randall S. Shafer, Stewart M. Robertson | 2022-09-13 |
| 11377925 | Through tubing P and A with bismuth alloys | Geir Ove Titlestad, David D. Hearn, Curtis G. Blount, Rick D. Watts, Randall S. Shafer +1 more | 2022-07-05 |