Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6966386 | Downhole sealing tools and method of use | Paul D. Ringgenberg, Lee W. Stepp, Donald R. Smith, Ronald L. Hinkie, Don S. Folds | 2005-11-22 |
| 6896061 | Multiple zones frac tool | Iosif Hriscu, Don S. Folds, Thomas W. Hawkins, John T. Brandell | 2005-05-24 |