Yasuhide Umaki

Person

  • Funabashi, JP

Patents Grantslast 30 patents

  • Information Patent Grant

    Cement composition

    • Patent number 5,181,961
    • Issue date Jan 26, 1993
    • Nihon Cement Co., Ltd.
    • Yasuhide Umaki
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES