Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5234062 | Automatic evacuation drilling bucket | — | 1993-08-10 |
| 4604818 | Under reaming pile bore excavating bucket and method of its excavation | — | 1986-08-12 |
| 4488606 | Method of excavating an under-reamed pile bore | — | 1984-12-18 |
| 4407376 | Under-reaming pile bore excavator | — | 1983-10-04 |
| 4396076 | Under-reaming pile bore excavator | — | 1983-08-02 |