Patents by Inventor David E. Curtis

David E. Curtis 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).

  • Radio link quality handoff trigger
    Patent number: 6021328
    Abstract: A method and system is disclosed for triggering handoff of a call from a CDMA network to an AMPS network on which it is overlaid responsive to a determination that the CDMA RF link has degraded to such an extent that the call quality will be degraded significantly or the call is likely to be dropped is disclosed.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: February 1, 2000
    Assignee: Northern Telecom Limited
    Inventors: David E. Curtis, William B. Book, David A. Boettger, Ahmad Jalali