Patents by Inventor William F. Holbrook

William F. Holbrook 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).

  • Method and apparatus for detection of cellular phone fraud
    Patent number: 5655004
    Abstract: A request for communication service between a mobile communication device, e.g., a cellular telephone, and a recipient is authenticated using a request for service message that includes an identification code specific to the mobile communication device and a transmitted authentication code which represents a cumulative total of the prior usage of the mobile communication device. The transmitted authentication code is received at a central processing facility and compared to a stored authentication code for the mobile communication device. Communication is initiated between the mobile communication device and the recipient if the transmitted authentication code and the stored authentication code match within established tolerances.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: August 5, 1997
    Inventor: William F. Holbrook