Patents by Inventor Margaret Lannen

Margaret Lannen 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).

  • Enhanced call delivery system for roaming cellular subscribers
    Patent number: 5497412
    Abstract: A system for enhanced call delivery to a roaming cellular subscriber, enabling said subscriber to receive calls placed to his MIN in his home system service area, utilizes a central telecommunications system processor capable of handling network applications, directly connected to a plurality of mobile telephone switches located in the service areas of a plurality of cellular telephone systems, each of said switches connected via a direct communication link to said central telecommunications system processor. A plurality of registers in said central telecommunications system processor are provided for storing data bases of system information, individual switch information, and subscriber information.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: March 5, 1996
    Assignee: GTE Telecommunication Services Incorporated
    Inventors: Margaret Lannen, Kenneth W. Hammer, Edward L. Didion