Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6888936 | User controlled location sharing during a communication | Pieter Groen, Paul Michael Brennan, Robert A. Williamson | 2005-05-03 |
| 6735295 | Call waiting messaging | Paul Michael Brennan, John C. Myers, Robert A. Williamson, Pieter Groen | 2004-05-11 |
| 6650746 | Urgency of call indication to called party through distinctive notification | Pieter Groen, Robert A. Williamson | 2003-11-18 |
| 6148063 | Semi-interruptible messages for telephone systems making voice announcements | Paul Michael Brennan, Robert A. Williamson | 2000-11-14 |