Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7162809 | Power saw guide | Andrew D. Ketch | 2007-01-16 |
| 5487430 | Pneumatic ground-piercing tool and body therefor | Steven W. Wentworth, Robert F. Crane | 1996-01-30 |
| 5465797 | Pneumatic ground piercing tool with detachable head | Steven W. Wentworth, Robert F. Crane, Payce D. Reynolds | 1995-11-14 |
| 5337837 | Dual-diameter pneumatic ground piercing tool | Steven W. Wentworth, Robert F. Crane, Payce D. Reynolds | 1994-08-16 |
| 5199151 | Method for making a pneumatic ground piercing tool | Steven W. Wentworth, Robert F. Crane | 1993-04-06 |
| 5025868 | Pneumatic ground piercing tool | Steven W. Wentworth, Robert F. Crane | 1991-06-25 |
| 4808024 | Method for installing a pavement underdrain | — | 1989-02-28 |