Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6909780 | Voice mail call out method and apparatus | Gilbert Hu, Chiaming Jen | 2005-06-21 |
| 6532230 | Mixed-media communication apparatus and method | Donggun Keung, Leo Liu | 2003-03-11 |
| 6493439 | Analog caller identification transmission method and apparatus | Leo Liu, Donggun Keung, Tzerng-Hong Lin | 2002-12-10 |
| 6292549 | Analog caller identification transmission method and apparatus | Leo Liu, Donggun Keung, Tzerng-Hong Lin | 2001-09-18 |