Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5334938 | Method of monitoring an internal combustion engine ignition system by measuring spark duration or voltage and distinction between isolated errors and recurrent errors | Arnd-Matthias Langner, Karlheinz Riedel, Richard Schleupen, Christian Zimmermann | 1994-08-02 |