Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5987112 | International call back technique with reduced post dialing delay | Arvind S Chakravarti, Edward D. Eng, Chi K. Lam, Yuk-Ming Peter Lam, Henry Shen | 1999-11-16 |
| 5802164 | Systems and methods for controlling telephone sound enhancement on a per call basis | Beth J. Clancy, Richard L. Else, Richard E. Le Cronier, Dario L. Parola, Roger E. Stone | 1998-09-01 |