Chan-Ho Yun

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Koyang City, KR

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Patents Grantslast 30 patents

Information Patent Grant
CDMA terminal for providing roaming service to GSM service subscrib...
- Patent number 7,043,238
- Issue date May 9, 2006
- KTFreetel Co., Ltd.
- Byung-Ik Ahn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Roaming service system for GSM service subscriber in CDMA service a...
- Patent number 6,681,111
- Issue date Jan 20, 2004
- Korea Telecom Freetel Co., Ltd.
- Byung-Ik Ahn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Cdma terminal for providing roaming service to gsm service subscrib...
- Publication number 20030148791
- Publication date Aug 7, 2003
- Byung-Ik Ahn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Roaming service system for GSM service subscriber in CDMA service a...
- Publication number 20020061745
- Publication date May 23, 2002
- Byung-Ik Ahn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE