Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6142165 | Method and apparatus for installing a branch connector from the top of an excavation | Dominique Pfeiffer, Patrick Le Cointe | 2000-11-07 |
| 6050351 | Drilling hole system for horizontal boreholes | Josef Eckenfels, Herbert Haas, Norbert Prinz, Dominique Pfeiffer | 2000-04-18 |