Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848488 | Method and device for adjusting the path of a drilling tool fixed to the end of a set of rods | Jean Boulet | 1989-07-18 |
| 4844178 | Drilling device having a controlled path | Jean Boulet | 1989-07-04 |
| 4821817 | Actuator for an appliance associated with a ducted body, especially a drill rod | Jean Boulet | 1989-04-18 |