Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5343967 | Apparatus for optional straight or directional drilling underground formations | Volker Kruger | 1994-09-06 |
| 5065826 | Apparatus for optional straight or directional drilling underground formations | Volker Kruger | 1991-11-19 |
| 5033556 | Method and apparatus for horizontal drilling | — | 1991-07-23 |
| 4739842 | Apparatus for optional straight or directional drilling underground formations | Volker Kruger | 1988-04-26 |