Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5957224 | Double bit assembly and method of using the same | — | 1999-09-28 |
| 5778988 | Drilling apparatus | — | 1998-07-14 |
| 5427187 | Method for adjusting the impact force on a hammer | — | 1995-06-27 |
| 5388649 | Drilling equipment and a method for regulating its penetration | — | 1995-02-14 |
| 5316092 | Method and apparatus for drilling a tunnel | — | 1994-05-31 |
| 5295734 | Method and apparatus for drilling a tunnel | — | 1994-03-22 |
| 5284403 | Control method and control equipment for drilling apparatus | — | 1994-02-08 |
| 5255960 | Tunnel drilling apparatus with drill waste removal | — | 1993-10-26 |
| 5240352 | Method for the mounting of underground pipelines | — | 1993-08-31 |
| 5236284 | Drilling apparatus and method for its control | — | 1993-08-17 |
| 5125768 | Method and apparatus for the production of underground pipelines | — | 1992-06-30 |