Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6551731 | Fuel cell system | Gerhard Filip, Bernd Kohlstruck, Arnold Lamm | 2003-04-22 |
| 6011324 | Arrangement for ensuring uninterrupted current supply to an electrical consumer | Bernd Kohlstruck | 2000-01-04 |