Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6493439 | Analog caller identification transmission method and apparatus | En-Kuang Lung, Leo Liu, Donggun Keung | 2002-12-10 |
| 6292549 | Analog caller identification transmission method and apparatus | En-Kuang Lung, Leo Liu, Donggun Keung | 2001-09-18 |
| 5572578 | Exchange of information between interconnected voice mail systems | Frank Lin, Michael Chen, Samir Dharia | 1996-11-05 |