Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8550862 | Ship propulsion system having a pump jet | — | 2013-10-08 |
| 5336119 | Drive unit for relatively small watercraft | Siegfried Lais, Stefan Huth, Stephan Schneider | 1994-08-09 |
| 5146865 | Water-jet propulsion system for ships which are intended to be used in shallow waters | Siegfried Lais | 1992-09-15 |