Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865135 | Top drive torque reactor | — | 1989-09-12 |
| 4830121 | Break-out joint with selective disabler | Igor Krasnov | 1989-05-16 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865135 | Top drive torque reactor | — | 1989-09-12 |
| 4830121 | Break-out joint with selective disabler | Igor Krasnov | 1989-05-16 |