Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6304655 | Signal capture for telecommunications switch | — | 2001-10-16 |
| 6055310 | Phase reversal tone detector using DSP | Naigang ZHANG | 2000-04-25 |
| 5745564 | Echo cancelling arrangement | — | 1998-04-28 |
| 5577097 | Determining echo return loss in echo cancelling arrangements | — | 1996-11-19 |