Shenzhen
China
5
2011-12-22
The entities that hold a legal rights for patent applications filed by inventor Yang Yanfei:
Yanfei Yang from Shenzhen, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
Method and system for establishing emergency call
#2 | 2010-01-21Method And System For Emergency Call
#3 | 2009-12-24SIP TERMINAL, METHOD AND SYSTEM FOR REPORTING STATUS THEREOF, AND SIP SERVER
#4 | 2009-05-14Method and system for establishing emergency call
#5 | 2007-06-21System and Method for IMS Bridging
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