Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836027 | Circuit for a sensor | Joachim Hannappel | 1989-06-06 |
| 4833472 | System for setting an analog resistor to a selectable, digitally predeterminable value | Joachim Hannappel | 1989-05-23 |