Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6590970 | Intelligent-networked telephone system having advertisement with bonus free phone call service | Shiyan Hua | 2003-07-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6590970 | Intelligent-networked telephone system having advertisement with bonus free phone call service | Shiyan Hua | 2003-07-08 |