Patents by Inventor Baijun Zhao

Baijun Zhao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6490450
    Abstract: A system and method for capturing and modifying roaming mobile subscriber information such as Serving MSCID, cell and sector location information, original dialed digits, subscriber profile and return address point code in support of service applications, such as wireless prepaid service for roaming subscribers. A network platform is inserted into the signaling path between a roaming subscriber's HLR and all Serving MSCs. The network platform intercepts messages exchanged between the roaming subscriber's Serving MSC and HLR, and extracts and stores information such as Serving MSCID, cell and sector data. The network platform may also modify the exchanged messages in support of service applications.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: December 3, 2002
    Assignee: AG Communication Systems Corporation
    Inventors: Ramachendra Prahlada Batni, Axel Michael Christiansen, Baijun Zhao