Jaehwang Yu

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Seoul, KR

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for ring back tone alternative service based on t...
- Patent number 8,606,241
- Issue date Dec 10, 2013
- SK Telecom Co., Ltd
- Seongsoo Park
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
MEMORY CARD SUPPLEMENTED WITH WIRELESS COMMUNICATION MODULE, TERMIN...
- Publication number 20110185098
- Publication date Jul 28, 2011
- SK Telecom Co., Ltd.
- Jeongdeok Kim
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
METHOD AND SYSTEM FOR RING BACK TONE ALTERNATIVE SERVICE BASED ON T...
- Publication number 20090098891
- Publication date Apr 16, 2009
- SK Telecom Co., Ltd.
- Seongsoo Park
- H04 - ELECTRIC COMMUNICATION TECHNIQUE