Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5403043 | Quick connect pipe coupling | — | 1995-04-04 |
| 5327980 | Drill head | — | 1994-07-12 |
| 5279373 | Controllable drill head | — | 1994-01-18 |
| 5184919 | Method for widening a hole or a pipe in the ground | — | 1993-02-09 |
| 5178223 | Device for making a hole in the ground | — | 1993-01-12 |
| 5101912 | Steerable ground drilling devices | — | 1992-04-07 |
| 5101918 | High pressure pipe and device for making a hole in the ground, provided with such high pressure pipe | — | 1992-04-07 |
| 5078218 | Steerable drilling mole | — | 1992-01-07 |
| 5002138 | Steerable drilling mole | — | 1991-03-26 |