Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811787 | Method for reducing the permeability of underground strata during secondary recovery of oil | Martin Navratil, Mojmir Sovak, Mark S. Mitchell | 1989-03-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811787 | Method for reducing the permeability of underground strata during secondary recovery of oil | Martin Navratil, Mojmir Sovak, Mark S. Mitchell | 1989-03-14 |