Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6792820 | Method and accessories for pipe replacement | Steven W. Wentworth | 2004-09-21 |
| 5465797 | Pneumatic ground piercing tool with detachable head | Steven W. Wentworth, Jon A. Haas, Robert F. Crane | 1995-11-14 |
| 5337837 | Dual-diameter pneumatic ground piercing tool | Steven W. Wentworth, Robert F. Crane, Jon A. Haas | 1994-08-16 |