| 8606241 |
Method and system for ring back tone alternative service based on terminal and mobile communication terminal therefor |
Seongsoo Park, Donghahk Lee, Jaehwang Yu, Jongtae Ihm, Sehyun Oh |
2013-12-10 |
| 8103254 |
Method and system for providing multimedia ring back tone service by using receiver-side switching center |
Seongsoo Park, Sangshin Lee, 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 |
Seongsoo Park, Seongkeun Kim, Donghahk Lee |
2011-12-27 |
| 7912510 |
Terminal for multimedia ring back tone service and method for controlling terminal |
Seongsoo Park, Sangshin Lee, Seongkeun Kim, Sehyun Oh, Myungsung Lee |
2011-03-22 |