Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6069942 | Method for the legitimacy check of call numbers of calls incoming at a communication system | Siegfried Spahl, Adolf Mayer | 2000-05-30 |
| 5864624 | Method for activating and executing protected functions in a communication system | Guenter Lukas, Peter Giese, Siegfried Spahl | 1999-01-26 |
| 5412781 | Method and arrangement of buffer allocation in communication systems by employing fixed and dynamic buffer allocation functions | Guenter Lukas, Siegfried Spahl | 1995-05-02 |