Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6655874 | Method and apparatus for slitting flexible pipe in an underground bore | Steven W. Wentworth | 2003-12-02 |
| 6588515 | Drill bit for directional drilling | Steven W. Wentworth | 2003-07-08 |
| 6568488 | Roller pipe burster | Steven W. Wentworth, Paul Hau | 2003-05-27 |
| 6533052 | Drill bit for impact-assisted directional boring | Steven W. Wentworth, Mark D. Randa, Randy R. Runquist, Richard K. Smith | 2003-03-18 |
| 6516899 | Method and apparatus for directional boring under mixed conditions | Steven W. Wentworth, Randy R. Runquist, Mark Van Houwelingen | 2003-02-11 |