Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4646829 | Hydraulically set and released bridge plug | Burchus Q. Barrington, Robert T. Evans | 1987-03-03 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4646829 | Hydraulically set and released bridge plug | Burchus Q. Barrington, Robert T. Evans | 1987-03-03 |