Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7533162 | Method, apparatus and system for supporting multiple collaborative sessions in a bi-directional communication device | Keith R. Broerman, Liangzhong Wang | 2009-05-12 |
| 6882658 | Flexible time slot for communication | Clarence Rudd | 2005-04-19 |
| 6359977 | Telephone port with automatic detection and secure | Clarence Rudd | 2002-03-19 |
| 6343113 | High impedance absolute telephone line voltage measurement circuit | — | 2002-01-29 |