Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805963 | Shield advancing machine | Peter Kogler, Wulf Martin, Herwig Wrulich | 1989-02-21 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805963 | Shield advancing machine | Peter Kogler, Wulf Martin, Herwig Wrulich | 1989-02-21 |