Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4282928 | Method for controlling permeability of subterranean formations | Charles J. McDonald, John V. Van Landingham | 1981-08-11 |
| 4182417 | Method for controlling permeability of subterranean formations | Charles J. McDonald, John V. Van Landingham | 1980-01-08 |