Patents by Inventor William D. Harbeson

William D. Harbeson 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).

  • Speech analysis apparatus
    Patent number: 4401850
    Abstract: Speech analysis apparatus converts sounds to electrical signals which are fed via a selectable low pass filter to extract the fundamental pitch frequency while attenuating the increase in energy with voice pitch and the influence of higher voice pitch harmonic frequencies. The pitch frequency representing signals are fed via a frequency to voltage transducer to a visual display device.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: August 30, 1983
    Assignee: Kay Elemetrics Corp.
    Inventor: William D. Harbeson
  • Speech analysis apparatus
    Patent number: 4276445
    Abstract: Speech analysis apparatus transduces speech sounds to electrical signals which are fed via a selectable low pass to extract the pitch frequency. The pitch frequency representing signals are fed via a frequency to voltage transducer to a visual display device.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: June 30, 1981
    Assignee: Kay Elemetrics Corp.
    Inventor: William D. Harbeson