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Korea Telecom Freetel Co., Ltd.
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Seoul, KR
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Patents Grants
last 30 patents
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
Information
Patent Grant
Signal processing apparatus and method for reducing the effects of...
Patent number
6,127,973
Issue date
Oct 3, 2000
Korea Telecom Freetel Co., Ltd.
Seung Won Choi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Design technique of an array antenna, and telecommunication system...
Patent number
5,999,800
Issue date
Dec 7, 1999
Korea Telecom Freetel Co., Ltd.
Seung Won Choi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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last 30 patents
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