Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854385 | Oil recovery process utilizing gravitational forces | B. George Hurd, Lloyd K. Strange | 1989-08-08 |
| 4815537 | Method for viscous hydrocarbon recovery | — | 1989-03-28 |
| 4807702 | Method for improving high impulse fracturing | Alfred R. Jennings, Jr. | 1989-02-28 |