Patents by Inventor Itsushi Magamoto

Itsushi Magamoto 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 head
    Patent number: 5451048
    Abstract: In construction of a golf club head made of metal or fiber reinforced plastics, its hosel is configured such that rigidity in the toe-to-heel direction is larger than that in the ball-shooting direction. During swinging of the club to impact a ball, not only does the shaft of the club flex but also its hosel. This double flexing results in increased impact on the ball. In addition, the specified rigidity distribution avoids undesirable toe-down deformation which tends to cause mishitting of the ball.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: September 19, 1995
    Assignee: Yamaha Corporation
    Inventors: Itsushi Magamoto, Tatsuya Hirakawa