Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5169183 | Threaded joint for drill rod elements | — | 1992-12-08 |
| 4993299 | Vertical gang saw apparatus | Kurt Brach, Vincent J. M. G. Favart, Jean-Claude O. P. Decroly, Pierre L. H. G. Ledru, Werner Haag +1 more | 1991-02-19 |
| 4887676 | Device for closing a core barrel installed in a drilling rig | — | 1989-12-19 |
| 4856719 | Cutting arm | — | 1989-08-15 |
| 4832138 | Device to control the locking of a boring corer | — | 1989-05-23 |
| 4765097 | Surface-dressing rollertool | — | 1988-08-23 |
| 4718398 | Circular saw for stony materials | — | 1988-01-12 |