Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6799454 | Method for functional checking of an exhaust recycling system on an internal combustion engine | Christian Birkner, Arno Friedrich | 2004-10-05 |
| 6701245 | Method for the functional diagnosis of an exhaust recycling system on an internal combustion engine | Christian Birkner | 2004-03-02 |