Patents by Inventor Joe E Defenderfer

Joe E Defenderfer 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).

  • Methods, systems, and computer program products for providing presence gateway functionality in a telecommunications network
    Patent number: 7933608
    Abstract: A method for providing presence gateway functionality includes deriving presence information for subscribers in a first set of subscribers based on telecommunications signaling messages. The first set of subscribers includes at least one subscriber who is not a subscribed-to presentity. The method also includes determining whether presence status information for a subscriber in the first set of subscribers has changed. In response to detecting a change in presence status, it is determined whether the subscriber is a subscribed-to presentity. If the subscriber is a subscribed-to presentity, a presence server is notified of the change in status of the subscriber.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: April 26, 2011
    Assignee: Tekelec
    Inventors: Aziz A. Tejani, Richard E. Schaedler, Venkataramaiah Ravishankar, Joe E Defenderfer, Larry Gene Slate, Patricia A. Baldwin, Richard Nolan Kennedy, Jr.