Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942837 | Ice breaker | Jens-Holger Hellmann, Hermann J. Janssen, Alfred Kleemann, Karl-Heinz Rupp, Joachim Schwarz +2 more | 1990-07-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942837 | Ice breaker | Jens-Holger Hellmann, Hermann J. Janssen, Alfred Kleemann, Karl-Heinz Rupp, Joachim Schwarz +2 more | 1990-07-24 |