Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7738861 | Caller identification using push-to-talk protocol for wireless communications devices | — | 2010-06-15 |
| 7444160 | Silent mode for mobile terminal push-to-talk | William M. Gray | 2008-10-28 |