Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5024274 | Method and apparatus for enhanced oil recovery | — | 1991-06-18 |
| RE33614 | Apparatus and method for enhanced oil recovery | Clark E. Robison, James B. Renfroe, Jr. | 1991-06-18 |
| 4646828 | Apparatus for enhanced oil recovery | Clark E. Robison, James B. Renfroe, Jr. | 1987-03-03 |