Patents Assigned to Nizunot Corporation
  • Golf club and set of golf clubs
    Patent number: 6478689
    Abstract: A golf club includes a shaft, a head attached to the tip end of the shaft, and a grip attached at the butt end of the shaft. The 14-inch balance is D0 or more. The club has initial velocity per equivalent pendulum length Vb/Lp that is larger than −3.57 Lc+64.58 when Lc represents the club length. The initial velocity Vb is defined as: Vb=1.8 Mh(56.22 Lc−35.16 Mc−39.77 Lp+31.61)/(Mh+0.0455) where Mh is the mass of the head (kg) and Mc is the total mass of the club.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: November 12, 2002
    Assignee: Nizunot Corporation
    Inventor: Goro Hisamatsu