Patents by Inventor Marshal McMahon

Marshal McMahon 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).

  • Apparatus and method for maintaining differential tensions in the strings of a sporting racket
    Patent number: 6179735
    Abstract: The present invention relates to an method and apparatus for springing sporting racquets to maintain differential tensions between racquet strings within the racquet, so that it is possible to provide racquets having predetermined properties of elastic quality. To maintain differential tensions between the strings, the strings are tensioned against frictional surface, with may be a high frictional surface such as a grommet strip, corner of a racquet string hole, or a pad of high friction material extending about the outer surface of the racquet.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: January 30, 2001
    Inventor: Marshal McMahon
  • Method of tensioning the strings in a racquet
    Patent number: 6027419
    Abstract: A method of stringing a racquet includes independently tensioning a plurality of strings in the racquet and maintaining the independent tensioning. Individual strings are held and their tensioning maintained using cleats and grommets. In this fashion, the elastic properties of the shorter strings may be matched to that of the longer strings, giving a larger sweet spot. The strings may be manufactured as a pre-woven mesh.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: February 22, 2000
    Assignee: Cogito Holdings Limited
    Inventor: Marshal McMahon