Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6792820 | Method and accessories for pipe replacement | Payce D. Reynolds | 2004-09-21 |
| 6789635 | Drill bit for directional drilling in cobble formations | Robert F. Crane, Douglas Caraway | 2004-09-14 |
| 6761507 | Method and apparatus for replacement of underground pipe | Mark D. Randa | 2004-07-13 |
| 6755593 | Pipe replacement method and rotary impact mechanism for pipe bursting | Robert F. Crane, Paul Hau | 2004-06-29 |