Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6735296 | Method and apparatus for swapping telephone numbers between switching modules | Yangling Zhang | 2004-05-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6735296 | Method and apparatus for swapping telephone numbers between switching modules | Yangling Zhang | 2004-05-11 |