Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850429 | Recovering hydrocarbons with a triangular horizontal well pattern | Wann-Sheng Huang, Stewart Haynes, Jr. | 1989-07-25 |
| 4819725 | Recovering oil bypassed by a steam override zone | Donald L. Hoyt | 1989-04-11 |