Patents by Inventor Kiyosi Watanabe

Kiyosi 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).

  • Mold assembly
    Patent number: 4708626
    Abstract: According to the invention, a mold assembly for molding an article is provided. The mold assembly is composed of at least male and female molds. At least one of the male and female molds is made of a hydraulic material composition having high strength containing a hydraulic material as a main ingredient. A molding face of at least one of the male and female molds is made of a substance other than the hydraulic material.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: November 24, 1987
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Etsuo Sakai, Asaaki Nishioka, Kiyosi Watanabe, Iwao Mino