Methods and systems for switching over a voice call | Patent Number 09578570
US 09578570 B2Filled DateAug 14, 2015
Priority DateDec 22, 2006
Publication DateDec 10, 2015
Expiration DateDec 21, 2026
Inventor/ApplicantsShin Cheung Simon Chiu
Chi Fai Ho
Chi Fai Ho
ExaminesPHAM, TIMOTHY X
Art Unit2641
Technology Center2600
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