Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6666177 | Method for operating an internal combustion engine comprising at least one working piston | Bernd Stiebels, Leo Spiegel | 2003-12-23 |
| 6647711 | Device for supplying exhaust gases from an internal combustion engine to a catalytic converter | Leo Spiegel, Michael Zillmer | 2003-11-18 |
| 6637190 | Method for desulphurating a nox-storage catalyst that is arranged in an exhaust channel of a combustion engine | — | 2003-10-28 |
| 6626798 | Device and method for operating an internal combustion engine provided with a butterfly valve in overrun mode | Michael Zillmer | 2003-09-30 |
| 6530216 | Method for desulfating an NOx accumulator catalytic converter | — | 2003-03-11 |