Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7860524 | Method of push-to-talk service | Stefan Wahl, Dieter Kopp | 2010-12-28 |
| 7756260 | Method for providing features to the user of a telephone, a central unit and a telecommunication system therefor | Stefan Wahl, Klaus Satzke | 2010-07-13 |