Patents Assigned to Nisso Ltd.
  • Sports implements with a long handle or portion
    Patent number: 5042805
    Abstract: A golf club includes a grip, shaft, and head. Within the shaft is disposed a spiral groove in which is disposed a coiled spring formed of a shape-memorizing alloy. Epoxy resin fills the groove and overlies the spring. The spring increases the strength of the shaft.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: August 27, 1991
    Assignee: Nisso Ltd.
    Inventor: Yoshinaga Nakai