Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4766829 | Catamaran-type marine craft | — | 1988-08-30 |
| 4702189 | Multiple-hulled marine craft | — | 1987-10-27 |
| 4678439 | Engine installation for use in a ship | — | 1987-07-07 |
| 4660492 | Catamaran air cushion water vehicle | Wolfgang Mangelsdorf | 1987-04-28 |
| 4586908 | Exhaust gas system for the internal combustion engines of a ship | — | 1986-05-06 |