Patents by Inventor Xiao L. Chen

Xiao L. Chen 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).

  • Voice-and-fax-over IP dialing plan
    Patent number: 6463053
    Abstract: A method for a user of telecommunication services to dynamically interchange routing paths between a carrier network circuit and the Internet for connecting to a destination. A user code is allocated which marks a connection request as requesting switching/routing via an IP network. When the code is detected by a carrier switch, the call connections are routed through the IP network. The user is provided with the option of terminating the IP network connection and selecting carrier network connection without call interruption.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: October 8, 2002
    Assignee: Nortel Networks Limited
    Inventor: Xiao L. Chen