Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6782946 | Method and apparatus for injecting one or more fluids into a borehole | Ernest H. Perkins, Douglas A. Lillico | 2004-08-31 |
| 6484805 | Method and apparatus for injecting one or more fluids into a borehole | Ernest H. Perkins, Douglas A. Lillico | 2002-11-26 |
| 5836391 | Wellbore sand control method | Ralph George Jonasson, Ernest H. Perkins | 1998-11-17 |
| 5293773 | Method for determining the wetting preference of particulate solids in a multiphase liquid system | Alexander Joseph Babchin, Haibo Huang, William D. Gunter | 1994-03-15 |