Patents by Inventor William J. Sobkow

William J. Sobkow 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).

  • Patent number: 6231456
    Abstract: A vibration damping insert adapted to be positioned within the hollow tubular shaft of a golf club. The insert includes a central rod member sized to fit within the hollow shaft of the club and a plurality of circumferentially spaced fins extending radially outwardly from and substantially coextensive with the rod member, with the fins sized and configured to engage the inner tubular surface of the shaft. The fins form a part of an annular outer body separate from the central rod member and formed of a material having a durometer hardness less than the durometer hardness of the central rod member. The central rod member and annular outer body are preferably formed in a coextrusion process.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: May 15, 2001
    Inventors: Graham Rennie, William J. Sobkow