Patents by Inventor Leonard A. Hulsman

Leonard A. Hulsman 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).

  • Automatic noise suppression system for acoustic height sensor
    Patent number: 4169255
    Abstract: An acoustic height sensor, particularly adapted for use in the foil-borne mode of operation of a hydrofoil, wherein sensitivity to noise pulses is materially reduced or essentially eliminated by monitoring for noise levels capable of producing interference and, if the noise persists for a sufficiently long period, suspending processing of any signal returns until the noise ceases. In the meantime, and as processing of signal returns is suspended, sample and hold circuitry maintains the output of the system at its previous level until the noise abates.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: September 25, 1979
    Assignee: The Boeing Company
    Inventors: Leonard A. Hulsman, Grant R. Montague