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Yasufumi Fujii

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  • Iwaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for producing an optical filter
    • Patent number 5,567,778
    • Issue date Oct 22, 1996
    • Kureha Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Optical filter
    • Patent number 5,466,755
    • Issue date Nov 14, 1995
    • Kureha, Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Resin-made heat-resistant optical fiber
    • Patent number 4,826,284
    • Issue date May 2, 1989
    • Kureha Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Photochromic lens
    • Patent number 4,756,973
    • Issue date Jul 12, 1988
    • Kureha Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Halogen-containing resin lens material
    • Patent number 4,704,006
    • Issue date Nov 3, 1987
    • Kureha Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Lens materials of high refractive indexes
    • Patent number 4,644,025
    • Issue date Feb 17, 1987
    • Kureha Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Halogen-containing lens material
    • Patent number 4,578,445
    • Issue date Mar 25, 1986
    • Kureha Kagaku Kogyo Kabushiki Kaisha
    • Teruo Sakagami
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...