Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6075979 | Radio receivers | Andreas Wichern, Wilfried Knop | 2000-06-13 |
| 5854973 | Radio receivers | — | 1998-12-29 |
| 5734974 | Selective call receivers with stepwise variable gain control | Edgar H. Callaway, Jr., James G. Mittel, Vance H. Peterson, Burkhard Dick, Wilfried Knop | 1998-03-31 |
| 5619152 | Circuit arrangement for supplying an alternating signal current | Andreas Wichern | 1997-04-08 |