Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6755249 | Apparatus and method for perforating a subterranean formation | Clark E. Robison, Paul D. Ringgenberg | 2004-06-29 |
| 6494261 | Apparatus and methods for perforating a subterranean formation | — | 2002-12-17 |
| 6328103 | Methods and apparatus for downhole completion cleanup | Paul D. Ringgenberg | 2001-12-11 |