Issued Patents 2005
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953095 | Method and system for operating a reversible pneumatic ground piercing tool | — | 2005-10-11 |
| 6923270 | Pneumatic impact piercing tool | — | 2005-08-02 |
| 6913091 | Method and apparatus for replacement of underground pipe | Steven W. Wentworth, Robert F. Crane | 2005-07-05 |
| 6860514 | Drill string joint | Steven W. Wentworth, Robert F. Crane | 2005-03-01 |