Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6269631 | Process and device for operating an internal combustion engine with less pollutant emission | Willi Neff, Klaus Pochner, Gerhard Lepperhoff | 2001-08-07 |
| 4948403 | Filter system for the removal of engine emission particulates | Gerhard Lepperhoff | 1990-08-14 |