Patents by Inventor Kenneth W. Heizer

Kenneth W. Heizer 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).

  • Voice security method and system
    Patent number: 4020285
    Abstract: The specification discloses a voice scrambler technique wherein a voice signal is split into a plurality of discrete frequency sub-bands. A random code generator generates a randomized sequence of digital signals. A preselected first portion of each of the digital signals is utilized to control the rearrangement of the order of the frequency sub-bands according to a limited subset of all possible combinations of rearrangements of the frequency sub-bands. The limited subset is chosen to include only the most unintelligible of the possible combinations of rearrangements of the frequency sub-bands. A preselected second portion of each of the digital signals is utilized to control the random inversion of one of the frequency sub-bands.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: April 26, 1977
    Assignee: Datotek, Inc.
    Inventors: Kenneth M. Branscome, William M. Feath, George E. Goode, Kenneth W. Heizer, Barrie O. Morgan
  • Voice security method and system
    Patent number: 4013837
    Abstract: The specification discloses a voice scrambler technique wherein a voice signal is split into a plurality of discrete frequency sub-bands. A random code generator generates a randomized sequence of digital signals. A preselected first portion of each of the digital signals is utilized to control the rearrangement of the order of the frequency sub-bands according to a limited subset of all possible combinations of rearrangements of the frequency sub-bands. The limited subset is chosen to include only the most unintelligible of the possible combinations of rearrangements of the frequency sub-bands. A preselected second portion of each of the digital signals is utilized to control the random inversion of ones of the frequency sub-bands.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: March 22, 1977
    Assignee: Datotek, Inc.
    Inventors: Kenneth M. Branscome, William M. Feath, George E. Goode, Kenneth W. Heizer, Barrie O. Morgan
  • Voice security method and system
    Patent number: 3991271
    Abstract: The specification discloses a voice scrambler technique wherein a voice signal is split into a plurality of discrete frequency sub-bands. A random code genertor generates a randomized sequence of digital signals. A preselected first portion of each of the digital signals is utiized to control the rearrangement of the order of the frequency sub-bands according to a limited subset of all possible combinations of rearrangements of the frequency sub-bands. The limited subset is chosen to include only the most unintelligible of the possible combinations of rearrangements of the frequency sub-bands. A preselected second portion of each of the digital signals is utilized to control the random inversion of ones of the frequency sub-bands.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: November 9, 1976
    Assignee: Datotek, Inc.
    Inventors: Kenneth M. Branscome, William M. Feath, George E. Goode, Kenneth W. Heizer, Barrie O. Morgan