Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189658 | Device for recording information on an optical data carrier | — | 1993-02-23 |
| 4813072 | Switching device for power supply to additional accessories for a telephone | Heinz Lange | 1989-03-14 |