Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7369546 | Method and apparatus for fast DTMF detection | Joachim Fouret, Mohamed El-Hennawey, Can LIAO | 2008-05-06 |
| 7272136 | Dual tone multi frequency signal detection | Joachim Fouret | 2007-09-18 |
| 6199036 | Tone detection using pitch period | — | 2001-03-06 |