Patents by Inventor Yoshihumi Nakajima

Yoshihumi Nakajima 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).

  • Golf club
    Patent number: 7416495
    Abstract: This invention provides a wood type golf club including a shaft, a grip at one end of the shaft, and a head at the other end of the shaft, wherein a mass m (g) of the golf club and a length L (cm) from a grip side end of the golf club to a barycentric position of the golf club satisfy m×L?2.60×104 (g·cm) and m×L2?2.270×106 (g·cm2), and the barycentric position of the shaft is within a range of 48.5% the total length of the shaft from a head side end of the shaft.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: August 26, 2008
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Wataru Ban, Yoshihumi Nakajima
  • Golf club
    Publication number: 20070105640
    Abstract: This invention provides a wood type golf club including a shaft, a grip at one end of the shaft, and a head at the other end of the shaft, wherein a mass m (g) of the golf club and a length L (cm) from a grip side end of the golf club to a barycentric position of the golf club satisfy m×L?2.60×104 (g·cm) and m×L2?2.270×106 (g·cm2), and the barycentric position of the shaft is within a range of 48.5% the total length of the shaft from a head side end of the shaft.
    Type: Application
    Filed: December 29, 2005
    Publication date: May 10, 2007
    Inventors: Wataru Ban, Yoshihumi Nakajima