Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666357 | DTMF tone passer in a voice communication system | — | 1997-09-09 |
| 5649055 | Voice activity detector for speech signals in variable background noise | Prabhat K. Gupta, Allan Lamkin, W. Robert Kepley, III, Adrian Morris | 1997-07-15 |
| 5606550 | Echo canceller and method for a voice network using low rate coding and digital speech interpolation transmission | — | 1997-02-25 |