Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6535727 | Method and apparatus for providing pre-pay and post-pay communication services using the same integrated | Zahid Abbasi, Minh Duy Khuc, Carl Rogers, Dan Sbisa | 2003-03-18 |