Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884848 | Device and method for exploiting material | Hubert Weissensteiner, Bernward Bruns | 1989-12-05 |
| 4805963 | Shield advancing machine | Peter Kogler, Berthold Scheiber, Wulf Martin | 1989-02-21 |