Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870738 | Vehicle mounted drill rod holding device | — | 1989-10-03 |
| 4854395 | Hydraulic kelly bar chuck | Raymond W. Burns | 1989-08-08 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870738 | Vehicle mounted drill rod holding device | — | 1989-10-03 |
| 4854395 | Hydraulic kelly bar chuck | Raymond W. Burns | 1989-08-08 |