Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6813879 | Method for heating up catalysts in the exhaust gas of internal combustion engines | Jens Wagner, Holger Bellmannn, Detlef Heinrich, Klaus Winkler | 2004-11-09 |
| 6813881 | Method of operating an internal combustion engine | Andreas Koring, Beate Rittmann, Holger Bellmann, Klaus Winkler | 2004-11-09 |