Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4545048 | Service integrated digital transmission system | Waldemar Hauk, Klaus Krull | 1985-10-01 |
| 4525834 | Service integrated digital transmission system | Klaus D. Schenkel | 1985-06-25 |