Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5448617 | Method of processing intelligent network service call with DTMF subscriber signalling in electronic switching system for toll/tandem | Tae Il Kim, Hyeong Ho Lee, Chung-Keun Lee, Go-Bong Choi, Young Sun Kim +2 more | 1995-09-05 |