Patents by Inventor Robert Lee Short

Robert Lee Short 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).

  • Spark plug with replaceable ground electrode
    Patent number: 5955827
    Abstract: An internal combustion engine spark plug having an inside annular groove at the end of its shell that accommodates a replaceable ground electrode that consists of a circular wire of durable metal that fits the annular groove and having ends that are pre-formed to terminate adjacent to the peripheral edge of the center electrode providing a double spark gap.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: September 21, 1999
    Inventor: Robert Lee Short