Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4977393 | Method and apparatus for monitoring the condition of charge of a battery connected to an appliance and including counters counted with respect to the time and drain of the battery | Werner Arnold | 1990-12-11 |
| 4771184 | Electronic switch apparatus | Wilhelm Sturzl | 1988-09-13 |