Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6913091 | Method and apparatus for replacement of underground pipe | Steven W. Wentworth, Mark D. Randa | 2005-07-05 |
| 6860514 | Drill string joint | Steven W. Wentworth, Mark D. Randa | 2005-03-01 |