Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5822978 | Method of controlling the electric heating of a catalytic converter | Walter Streit, Erhard Otto, Achim Donnerstag, Kurt Maute, Alfred Wirth +1 more | 1998-10-20 |
| 5635771 | Secondary accumulator charging/discharging for a motor vehicle using a controllable resistor | Erhard Otto, Walter Streit, Kurt Maute, Wolfgang Zag, Dirk Katzenellenbogen | 1997-06-03 |