Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661971 | Method for reducing pollutants in the exhaust gas of a multi-cylinder internal combustion engine | Wolfgang Wehling | 1997-09-02 |
| 5642708 | Method of modifying the motion of an output-varying control element | Axel Heinrich, Frank Schulze | 1997-07-01 |