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KTFREETEL CO., LTD.
SEOUL, KR
1. 20090248475 OPEN MOBILE BUSINESS SUPPORTING SYSTEM AND METHOD 10-01-20092. 20090219803 ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATION OPERABLE ON FREQUENCY SELECTIVE CHANNEL, AND CHANNEL COMPENSATION METHOD 09-03-2009
3. 20080247363 METHOD FOR PROVIDING MOBILE SERVICE USING CODE-PATTERN 10-09-2008
4. 20080245870 METHOD FOR PROVIDING MOBILE SERVICE USING CODE-PATTERN 10-09-2008