Patents by Inventor Sigeru Imai

Sigeru Imai 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: 4322083
    Abstract: A golf club head in which the center of gravity of the mass thereof is located on a line perpendicular to a club face of the head and passing through a meet point prelocated on the club face.
    Type: Grant
    Filed: October 10, 1979
    Date of Patent: March 30, 1982
    Assignee: Shintomi Golf Co., Ltd.
    Inventor: Sigeru Imai