Patents by Inventor John C Sager

John C Sager 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).

  • Hybrid network
    Publication number: 20040090972
    Abstract: The 802.11b wireless LAN specification is compromised by the weaknesses of WEP. The invnetion routes wireless transmissions to the LAN via a firewall or VPN gateway and encrypts them.
    Type: Application
    Filed: September 25, 2003
    Publication date: May 13, 2004
    Inventors: Mark A Barrett, David J Armes, John C Regnault, John C Sager, Jennifer F Massicott
  • Reception apparatus for authenticated access to coded broadcast signals
    Patent number: 6473742
    Abstract: Decoding of a broadcast signal is enabled only if it carries an identifier verified by its presence (or absence) in a stored list. The list is loaded from a removable module. Preferably the loading of the list is conditional upon the success of a cryptographically authenticated exchange of signals between the module and the main part of the receiver.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: October 29, 2002
    Assignee: British Telecommunications public limited company
    Inventor: John C Sager
  • Computer of processor control systems
    Patent number: 4628508
    Abstract: A processor control system for controlling items of hardware includes pairs of processors associated with the hardware items. One processor of each pair operates the process or processes for controlling the associated hardware, while the other processor of each pair operates other processes. In the event of a fault in one processor the processes on that processor are transferred to spare processors and the hardware control process is transferred to the other processor of the pair. This arrangement makes more effective use of standby processing capacity.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: December 9, 1986
    Assignee: British Telecommunications
    Inventors: John C. Sager, Kenneth D. Odam, Robert T. Boyd, Peter W. Dell