Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6438947 | Method for adapting a raw NOx concentration value of an internal combustion engine operating with an excess of air | Wolfgang Ludwig, Hong Zhang | 2002-08-27 |
| 6347513 | Method for regenerating a NOx storage catalytic converter for an internal combustion engine | Hong Zhang | 2002-02-19 |