Patents Assigned to Shintomi Golf Co., Ltd.
  • Golf-club head
    Patent number: 5630888
    Abstract: A golf club head is formed of an alloy steel which comprises at most 0.2 wt. % of C, 0.05-1.0 wt. % of Si, at most 0.5 wt. % of Mn, 3.0-8.0 wt. % of Ni, 10.0-20.0 wt. % of Cr, 3.0-8.0 wt. % of Mo and 10.0-20.0 wt. % of Co, the remainder being substantially Fe, and has a metallic texture composed principally of martensite.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: May 20, 1997
    Assignees: Shintomi Golf Co., Ltd., Kasco Corporation
    Inventors: Daisaku Yoshida, Katsumi Yamano
  • Golf-club head
    Patent number: 5569337
    Abstract: A golf club head is formed of an alloy steel which comprises at most 0.2 wt. % of C, 0.05-1.0 wt. % of Si, at most 0.5 wt. % of Mn, 3.0-8.0 wt. % of Ni, 10.0-20.0 wt. % of Cr, 3.0-8.0 wt. % of Mo and 10.0-20.0 wt. % of Co, the remainder being substantially Fe, and has a metallic texture composed principally of martensite.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: October 29, 1996
    Assignees: Shintomi Golf Co., Ltd., Kasco Corporation
    Inventors: Daisaku Yoshida, Katsumi Yamano
  • 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