Patents Assigned to Sumitoto Rubber Industries, Ltd.
  • Golf club head
    Patent number: 4809978
    Abstract: A golf club head of a wood-type or an iron-type golf club having a face plate forming a part of the entire impact front face of the club head, and the face plate is formed of an ionomer resin having a compression Young's modulus in the range of 20 to 50 Kg/mm.sup.2.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: March 7, 1989
    Assignee: Sumitoto Rubber Industries, Ltd.
    Inventors: Tetsuo Yamaguchi, Koichiro Kurahashi