Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819723 | Reducing the permeability of a rock formation | Donald L. Whitfill, Nick Wolf | 1989-04-11 |
| 4773481 | Reducing permeability of highly permeable zones in underground formations | Joe D. Allison | 1988-09-27 |