Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291417 | Method and arrangement for determining the internal resistance of a lambda probe and for the closed-loop heating control with the aid of the internal resistance | Eberhard Schnaibel, Lothar Raff, Michael Westerdorf | 1994-03-01 |