Patents by Inventor Kazuo Irimajiri

Kazuo Irimajiri 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: 4611810
    Abstract: A golf ball having compression strength greater than 7000 kg-f and rebound height greater than 90/120, said golf ball comprising a rubber composition filled with 10 to 40 parts by weight of calcium carbonate based on 100 parts by weight of the rubber, the calcium carbonate having a BET specific surface area of 60 to 300 m.sup.2 /g and a particle diameter of 0.035 to 0.010 micrometers.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: September 16, 1986
    Assignees: Toyo Denka Kogyo Co., Ltd., Kamatari Co., Ltd.
    Inventors: Toshihiko Kamata, Shunji Izumi, Kazuo Irimajiri, Setsuji Edagawa