Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7415266 | Method and apparatus for providing pre-pay and post-pay communication services using the same integrated system | Zahid Abbasi, Minh Duy Khuc, Carl Rogers, Isaac Shane Allen | 2008-08-19 |
| 6847708 | Method and apparatus for validating pre-pay and post-pay communication services using the same integrated database | Zahid Abbasi, Minh Duy Khuc, Carl Rogers, Isaac Shane Allen | 2005-01-25 |
| 6760418 | Method and apparatus for providing pre-pay and post-pay communication services using a switching system to monitor call duration | Zahid Abbasi, Minh Duy Khuc, Carl Rogers, Isaac Shane Allen | 2004-07-06 |
| 6535727 | Method and apparatus for providing pre-pay and post-pay communication services using the same integrated | Zahid Abbasi, Minh Duy Khuc, Carl Rogers, Isaac Shane Allen | 2003-03-18 |