Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6555260 | Fuel cell system having a fuel cell stack with integrated polarity reversal protection diode | Markus Aberle, Josef Sonntag | 2003-04-29 |
| 6531876 | Apparatus for voltage measurement | Johann Einhart, Josef Sonntag | 2003-03-11 |