Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5632304 | Exhaust butterfly system | Karl-Heinz Kempka, Dietmar Froese, Georg Reuther, Christian Kroeger | 1997-05-27 |
| 4913712 | Filter for cleaning exhaust gases of diesel engines | Jean-Pierre Gabathuler, Tiberiu Mizrah, Manfred Doll | 1990-04-03 |