Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6789635 | Drill bit for directional drilling in cobble formations | Steven W. Wentworth, Douglas Caraway | 2004-09-14 |
| 6755593 | Pipe replacement method and rotary impact mechanism for pipe bursting | Steven W. Wentworth, Paul Hau | 2004-06-29 |