Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7433477 | Audio superpositioning | Klaus Graef | 2008-10-07 |
| 7388955 | Combine audio and ringing mode | Klaus Graef | 2008-06-17 |
| 6970111 | Sample rate adjustment | Markus Engelhardt, Gary Hague | 2005-11-29 |
| 6873705 | Combine audio and ringing mode | Klaus Graef | 2005-03-29 |