Patents by Inventor Frederick W. Hilmer

Frederick W. Hilmer 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).

  • On-vehicle diagnostic unit for electronic ignition systems
    Patent number: 4689573
    Abstract: An on-vehicle diagnostic unit for an electronic ignition system monitors input signal received and output signals produced by the electronic ignition control unit on a continuous basis and displays an indiction of proper operation or failure. The failure indication is produced in response to a permanent or intermittent failure, irrespective of the failure mode of the electronic ignition control unit.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: August 25, 1987
    Assignee: Switches, Inc.
    Inventor: Frederick W. Hilmer