Patents by Inventor Terence Thorndyke

Terence Thorndyke 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).

  • Portable animal control unit
    Patent number: 4689776
    Abstract: A portable animal control unit includes circuitry incorporated in a miniature housing for generating an animal influencing modulated soundwave in the ultrasonic frequency range. A first oscillator produces an output signal for driving an ultrasonic transducer, the output signal having a center frequency in the ultrasonic range. A second oscillator produces an output control signal for modulating the frequency of the first oscillator, the modulation rate being determined by the center frequency of the second oscillator output signal and the amount of deviation of the second oscillator from the center frequency.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: August 25, 1987
    Inventors: Terence Thorndyke, Allan L. Swain