Patents by Inventor Noburo Sumikawa

Noburo Sumikawa 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: 5586944
    Abstract: In construction of a wood type golf club head, its main body made of a material unsuited for plastic deformation such as FRP and its and hosel made of a material suited for plastic deformation such as metal are separably coupled to each other. Subtle adjustment of ball striking characteristics such as loft and lie angles can be practiced quite freely independently of the material used for the main body.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: December 24, 1996
    Assignee: Yamaha Corporation
    Inventors: Itsushi Nagamoto, Noburo Sumikawa, Tatsuya Hirakawa, Tatsuo Nakanishi