Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819664 | Voice communication system | — | 2004-11-16 |
| 6801540 | Internet phone-based private exchange and call signal exchanging method thereof | — | 2004-10-05 |
| 6618369 | Internet phone protocol | Jung Sun Huh, Jung Hyun Kim, Hyeon Cheol Cho | 2003-09-09 |