Patents by Inventor Billy D. Etherton

Billy D. Etherton 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).

  • Liquid conductivity measuring device
    Patent number: 3992662
    Abstract: A portable device for measuring the conductivity of a liquid between two probes spaced relative to each other along the lateral axis of a container. The gains of a plurality of operational amplifiers are varied for range, by conductivity and by temperature variations to provide a signal representative of the conductivity of the liquid. An oscillator using two operational amplifiers is used to drive the measuring amplifier.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: November 16, 1976
    Assignees: Billy D. Etherton, Eugene P. Ziner, William E. Berry, Russell J. Horn
    Inventors: Glenn Koepnick, Richard T. Balzen, Billy D. Etherton