Patents by Inventor Lars M. Bergmark

Lars M. Bergmark 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).

  • Earth ground assembly comprising a driving point, a driving rod, and a continuous conductor wire
    Patent number: 4316050
    Abstract: An earth ground assembly includes: a tubular driving point in the form of a sleeve; a drive rod fitting into the upper end of the sleeve and having an edge-shaped section which clamps a conductor wire against the inside of the sleeve, the upper end of the sleeve having an outwardly extending lip through which the conductor wire extends; and joint tubes arranged end-to-end to form an extension on the drive rod.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: February 16, 1982
    Assignee: F S Elteknik AB
    Inventor: Lars M. Bergmark