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Personal IP toll-free number
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Patent number 8,711,735
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Issue date Apr 29, 2014
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AT&T Intellectual Property, II, L.P.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Personal IP toll-free number
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Patent number 8,218,527
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Issue date Jul 10, 2012
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AT&T Intellectual Property II, L.P.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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System with call forward profile
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Patent number 7,496,190
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Issue date Feb 24, 2009
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AT&T Intellectual Property II, L.P.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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BRG with PBX capabilities
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Patent number 7,075,918
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Issue date Jul 11, 2006
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AT&T Corp.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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IP call forward profile
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Patent number 6,937,713
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Issue date Aug 30, 2005
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AT&T Corp.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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IP conference call waiting
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Patent number 6,816,469
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Issue date Nov 9, 2004
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AT&T Corp.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Wireless centrex caller ID
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Patent number 6,738,615
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Issue date May 18, 2004
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AT&T Corp.
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Albert Chow
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Anonymous call rejection
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Patent number 6,680,935
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Issue date Jan 20, 2004
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AT&T Corp.
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Fen-Chung Kung
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H04 - ELECTRIC COMMUNICATION TECHNIQUE