Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625453 | Efficient wireless call delivery across regional and political boundaries | Weiqian Dai | 2003-09-23 |
| 6587688 | Providing telephone number data for international cellular roamer service | Michael D. Chambers, Chee Keong Lee, Charles C Teising, Jr. | 2003-07-01 |