Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7681644 | Managing lost returns in a wellbore | John K. Montgomery, Stuart R. Keller, Martin V. Smith, Robert S. Williamson, III | 2010-03-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7681644 | Managing lost returns in a wellbore | John K. Montgomery, Stuart R. Keller, Martin V. Smith, Robert S. Williamson, III | 2010-03-23 |