Patents by Inventor Lifang Joann Xu

Lifang Joann Xu 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).

  • Method and apparatus for handling subscription and administrative requests in a local service management system
    Patent number: 5933489
    Abstract: To support local number portability and service portability in a telephone network, a method and apparatus handle subscription and administrative service requests in a local service management system to maintain records at a service control point. The subscription requests include create, modify, and delete requests of records in the service control point. The administrative service requests include Numbering Plan Area (NPA) code split, mass change, and query and resend requests. The records at the service control point are accessible by switches via respective signal transfer points to determine the network addresses of the switches handling services and calls corresponding to a particular telephone number.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: August 3, 1999
    Assignee: Telcordia Technologies, Inc.
    Inventors: Thomas H. Sensabaugh, Jatinder S. Hayer, Nilay Ghoghari, George M. Tsacnaris, William F Woodbury, John Phillip Malyar, Elie Rosenfeld, Manish Bhardwaj, Lifang Joann Xu