Patents by Inventor Katsunobu Yamagishi

Katsunobu Yamagishi 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 ball
    Patent number: 5050886
    Abstract: A golf ball is disclosed, which comprises a core and a shell surrounding said core, said core composed of (a) a matrix formed of a first, relatively hard rubber and (b) a multiplicity of particles dispersed in said matrix and accounting for 10-65% of the volume of said core, said particles being formed of a second, relatively soft rubber and having a particle size of greater than 0.8 mm but not greater than 7.0 mm. This golf ball provides long carry and distance and gives hands a soft strike shock.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: September 24, 1991
    Assignee: Kamatari Co., Ltd.
    Inventors: Katsunobu Yamagishi, Yasuhiro Fukui