Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12407338 | Frequency multiplier circuits having cross-coupled capacitors therein which support frequency multiplication | Taewook Kim, Hyunwoong Lim, Taewan Kim, Hyungyu Kim, Jooik Chung +1 more | 2025-09-02 |
| 8606241 | Method and system for ring back tone alternative service based on terminal and mobile communication terminal therefor | Daesic Woo, Donghahk Lee, Jaehwang Yu, Jongtae Ihm, Sehyun Oh | 2013-12-10 |
| 8195470 | Audio data packet format and decoding method thereof and method for correcting mobile communication terminal codec setup error and mobile communication terminal performance same | Seongkeun Kim, Sehyun Oh | 2012-06-05 |
| 8103254 | Method and system for providing multimedia ring back tone service by using receiver-side switching center | Sangshin Lee, Daesic Woo, Donghahk Lee, Wonsuk Chung, Joosik Lee +1 more | 2012-01-24 |
| 8085906 | Method, system and apparatus for providing alternative multimedia ring back tone substitute service by using intelligent network | Daesic Woo, Seongkeun Kim, Donghahk Lee | 2011-12-27 |
| 8059564 | Method and system for terminal codec setup of multimedia ring back tone service | Donghahk Lee, Wonsuk Chung, Seongkeun Kim, Heehyeok Hahm, Sehyun Oh +1 more | 2011-11-15 |
| 8009627 | Method and system for providing interworking with portable internet network and other kinds of networks | Sangshin Lee, Jinsung Cho, Intae Ryoo, Donghahk Lee | 2011-08-30 |
| 7912510 | Terminal for multimedia ring back tone service and method for controlling terminal | Sangshin Lee, Daesic Woo, Seongkeun Kim, Sehyun Oh, Myungsung Lee | 2011-03-22 |