Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4287716 | Exhaust gas system for internal combustion engines | Karl Jans, Rolf Ohlendorf | 1981-09-08 |
| 4235846 | Converter for exhaust gas with removable insert housings having monolithic catalyst therein | Jorg Abthoff, Hans-Joachim Langer | 1980-11-25 |
| 4205971 | Soot filter in the exhaust gas flow of air-compressing internal combustion engines | Jorg Abthoff, Rolf Gabler | 1980-06-03 |