Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6141959 | Multi-cylinder air-compressing injection-type internal-combustion engine | Frank Duvinage, Walter Friess, Alexander Funk, Anton Kerckhoff, Bernd Krutzsch +3 more | 2000-11-07 |
| 6082325 | Process and system for operating a diesel engine | Frank Duvinage, Hans Fausten, Walter Friess, Anton Kerckhoff, Thomas Liebscher +2 more | 2000-07-04 |