Patents by Inventor David Allen Link

David Allen Link 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).

  • Device for visually displaying the auditory content of the human voice
    Patent number: 4063035
    Abstract: A voiced-sound frequency analysis and display system displays two forms of spectral information about the signal: (1) the first and second formants as a point on an X-Y grid of a cathode ray tube, and (2) the full spectrum as a bar graph on an oscilloscope. Two sets of filters with associated circuitry perform the analysis. A scanning (peak hunting) second-formant selector circuit is also disclosed.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: December 13, 1977
    Assignee: Indiana University Foundation
    Inventors: Dudley Ralph Appelman, David Allen Link, Gerald Louret Stout