Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6408620 | Exhaust-gas cleaning system with nitrogen oxide accumulator catalyst and sulphur oxide trap and operating method therefor | Walter Boegner, Josef Gunther, Hans-Peter Holzt, Bernd Krutzsch, Stefan Renfftlen +3 more | 2002-06-25 |
| 6338244 | Exhaust gas purification process and apparatus with internal generation of ammonia for reducing nitrogen oxide | Josef Guenther, Brititte Konrad, Bernd Krutzsch, Arno Nolte, Dirk Voigtlaender +2 more | 2002-01-15 |