Patents Assigned to Maruman Gold Co., Ltd.
  • Golf club head
    Patent number: 4809982
    Abstract: A golf club head is provided with a straight through hole for the passage of air extending from an inlet in the sole to an outlet in the central back side.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: March 7, 1989
    Assignee: Maruman Gold Co., Ltd.
    Inventor: Masashi Kobayashi