Patents by Inventor Clarence M. Sidlo

Clarence M. Sidlo 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).

  • Video control system for recorded programs
    Patent number: 5054064
    Abstract: A video system includes a central facility and a terminal. Means are provided for playing a video recording medium storing a video program including a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data, and a second field containing an unintelligible video signal previously transformed from a intelligible video signal according to the random digital code. The terminal includes means for sending the program identification data to the central facility. The central facility includes a data base for storing and retrieving at least one code encryption key corresponding to the program identification data and means for sending the code encryption key from the central facility to the terminal.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: October 1, 1991
    Assignee: GTE Laboratories Incorporated
    Inventors: Stephen S. Walker, Clarence M. Sidlo, Melvin J. Teare
  • Video control system for transmitted programs
    Patent number: 5046092
    Abstract: A video system includes a central facility and a terminal. Means are provided for transmitting to the terminal a video program including a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data, and a second field containing an unintelligible video signal previously transformed from an intelligible video signal according to the random digital code. The terminal includes means for sending the program identification data to the central facility. The central facility includes a data base for storing and retrieving at least one code encryption key corresponding to the program identification data and means for sending the code encryption key from the central facility to the terminal.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: September 3, 1991
    Assignee: GTE Laboratories Incorporated
    Inventors: Stephen S. Walker, Clarence M. Sidlo, Melvin J. Teare
  • Recorded medium for video control system
    Patent number: 5046090
    Abstract: A video recording medium storing a video program includes a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data, and a second field containing an unintelligible video signal previously transformed from an intelligible video signal according to the random digital code.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: September 3, 1991
    Assignee: GTE Laboratories Incorporated
    Inventors: Stephen S. Walker, Clarence M. Sidlo, Melvin J. Teare
  • Video control system having session encryption key
    Patent number: 4991208
    Abstract: A video system includes a central facility and a terminal. Video program means for provides the terminal with a video program including a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data, and a second field containing an unintelligible video signal previously transformed from an intelligible video signal according to the random digital code. The terminal includes means to store terminal identification data and a terminal specific encryption key; and means to send to the central facility the program idenficiation data and the terminal identification data.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: February 5, 1991
    Assignee: GTE Laboratories Incorporated
    Inventors: Stephen S. Walker, Clarence M. Sidlo, Melvin J. Teare