Patents by Inventor C. J. Hunting

C. J. Hunting 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).

  • Digital data cryptographic system
    Patent number: 5406627
    Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: April 11, 1995
    Assignee: NEC Home Electronics, Ltd.
    Inventors: John R. Thompson, C. J. Hunting, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller
  • Audio signal cryptographic system
    Patent number: 5267312
    Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: November 30, 1993
    Assignee: NEC Home Electronics, Ltd.
    Inventors: John R. Thompson, C. J. Hunting, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller
  • System and method for scrambling and/or descrambling a video signal
    Patent number: 5185794
    Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: February 9, 1993
    Assignee: NEC Home Electronics, Ltd.
    Inventors: John R. Thompson, C. J. Hunting, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller
  • System and method for detection of a pulse within a video signal
    Patent number: 5166976
    Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal of a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: November 24, 1992
    Assignee: NEC Home Electronics, Ltd.
    Inventors: John R. Thompson, C. J. Hunting, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller
  • System and method for transmitting entertainment information to authorized ones of plural receivers
    Patent number: 5091938
    Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: February 25, 1992
    Assignee: NEC Home Electronics, Ltd.
    Inventors: John R. Thompson, C. J. Hunting, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller