Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852611 | Wellhead connection of hydraulic control lines | Edwin R. Knerr, Robert E. Hart | 1989-08-01 |
| 4797029 | Remotely installing a tubular string | Edward M. Galle, Jr. | 1989-01-10 |