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Masaji Harakawa

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Patents Grantslast 30 patents

  • Information Patent Grant

    Abrasive material
    • Patent number 5,224,970
    • Issue date Jul 6, 1993
    • Sumitomo Chemical Co., Ltd.
    • Masaji Harakawa
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Process for producing alumina-based fiber
    • Patent number 5,002,750
    • Issue date Mar 26, 1991
    • Sumitomo Chemical Company, Limited
    • Hidekimi Kadokura
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Process for producing inorganic fiber
    • Patent number 4,495,121
    • Issue date Jan 22, 1985
    • Sumitomo Chemical Company, Ltd.
    • Shozo Horikiri
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES