Patents by Inventor Angela S. Liu

Angela S. Liu 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).

  • Apparatus and method to identify inter-MTA calls
    Patent number: 7088806
    Abstract: Methods and apparatus for determining whether a phone call is an inter-MTA or an intra-MTA call. Call detail records are retrieved that describe the call. An originating MTA is determined using the originating NPA/NXX, while the terminating MTA is determined using the terminating NPA/NXX. The determined originating MTA is compared with the determined terminating MTA to determine whether the phone call is an inter-MTA or an intra-MTA call.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: August 8, 2006
    Assignee: Agilent Technologies, Inc.
    Inventor: Angela S. Liu
  • Apparatus and method to identify inter-MTA calls
    Publication number: 20040252818
    Abstract: Methods and apparatus for determining whether a phone call is an inter-MTA or an intra-MTA call. Call detail records are retrieved that describe the call. An originating MTA is determined using the originating NPA/NXX, while the terminating MTA is determined using the terminating NPA/NXX. The determined originating MTA is compared with the determined terminating MTA to determine whether the phone call is an inter-MTA or an intra-MTA call.
    Type: Application
    Filed: June 13, 2003
    Publication date: December 16, 2004
    Inventor: Angela S. Liu