Patents by Inventor William I. Corthell

William I. Corthell 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).

  • Warning light control
    Patent number: 4013921
    Abstract: The visibility of warning lights employing flash tubes is enhanced by control circuitry which generates closely spaced trigger pulse pairs for energizing the tubes to thereby produce double flashes. Noticeability of the warning light may be enhanced by addition thereto of a noise maker which operates off the same power supply that provides a high voltage for operating the flash tube or tubes.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: March 22, 1977
    Assignee: Austin Electronics, Inc.
    Inventor: William I. Corthell