Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6722452 | Pantograph underreamer | Monty H. Rial, Joseph A. Zupanick, Harold E. Payne | 2004-04-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6722452 | Pantograph underreamer | Monty H. Rial, Joseph A. Zupanick, Harold E. Payne | 2004-04-20 |