Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942837 | Ice breaker | Jens-Holger Hellmann, Richard Holscher, Hermann J. Janssen, Alfred Kleemann, Karl-Heinz Rupp +2 more | 1990-07-24 |
| 4506617 | Ship | Ayres Freitas, Jurgen M. Schultz, Gunter Varges | 1985-03-26 |