Patents by Inventor William T. Lindemann

William T. Lindemann 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).

  • Bubble detector circuit with variable reference level
    Patent number: 4487601
    Abstract: A bubble detector system is provided which dynamically responds to changes in energy transmission efficiency. The output of a detector is coupled to a dynamic reference level circuit, which develops a reference level that changes slowly in a time-varying manner with changes in the energy level received by the detector. The output of the detector is also coupled to a bubble detector circuit which produces a detection signal that changes rapidly when gas is present between an energy source and the detector. The detection and reference levels are compared to detect the presence of gas in the flow of fluid between the energy source and the detector.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: December 11, 1984
    Assignee: Extracorporeal Medical Specialties, Inc.
    Inventor: William T. Lindemann