Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7192322 | Line design and propulsion system for a directionally stable, seagoing boat with rudder propeller drive system | Adam Grzonka, Jan Kanar, Ryszard Lech, Kay Tigges | 2007-03-20 |