Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5220504 | Evaluating properties of porous formations | Gary R. Holzhausen, J. Jamie Goemez-Hernandez, Howard N. Egan | 1993-06-15 |
| 5081613 | Method of identification of well damage and downhole irregularities | Gary R. Holzhausen, Howard N. Egan | 1992-01-14 |