Patents by Inventor I. Watanabe

I. Watanabe 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 and process for its fabrication
    Patent number: 4988104
    Abstract: A golf club head includes a frame having a plurality of hollow axial members extending from the front side to the rear side, and a hosel part is integrally formed with the frame. A foam resin core is deposited around the frame. A face plate is disposed at the front side of the frame. A synthetic resin covering is applied over the frame and over the core by installing the assembly of the frame and core in a mold and pouring in the synthetic resin material at a low pressure so as not to deform or shift the frame or the core and the synthetic resin fills the gaps among the frame, the core and the face plate.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: January 29, 1991
    Assignee: Kunimori-Kagaku Co., Ltd.
    Inventors: Tadahiko Shiotani, I. Watanabe