Patents by Inventor Robert C. Ewald

Robert C. Ewald 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).

  • Patent number: 7395075
    Abstract: A wireless device and method for providing location updates to a wireless network includes determining a current location of the wireless device, comparing the current location to a second location and transmitting a location update, including presence information, to the wireless network when the current location differs from the second location by at least a predetermined geographical distance. The predetermined geographical distance is determined in accordance with at least one of subscription information associated with the subscriber unit, including a subscription fee paid, an enabled service and a network state. The current location may be determined via GPS, wireless network based position determination or other method.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: July 1, 2008
    Assignee: Nextel Communications Inc.
    Inventors: Jeffrey Scott Posner, Robert C. Ewald