TREA

Yuuichi Yokoyama

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  • Kunitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Material for contact lens and contact lens prepared therefrom
    • Patent number 5,623,002
    • Issue date Apr 22, 1997
    • Hoya Corporation
    • Masashi Nomura
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing cyanopsia-correctable intraocular lens
    • Patent number 5,374,663
    • Issue date Dec 20, 1994
    • Hoya Corporation
    • Masanori Daicho
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Contact lens
    • Patent number 5,302,678
    • Issue date Apr 12, 1994
    • Hoya Corporation
    • Masashi Nomura
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Contact lens material and contact lens
    • Patent number 5,264,465
    • Issue date Nov 23, 1993
    • Hoya Corporation
    • Hideyuki Futamura
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Contact lens
    • Patent number 5,194,542
    • Issue date Mar 16, 1993
    • Hoya Corporation
    • Hidetoshi Iwamoto
    • G02 - OPTICS
  • Information Patent Grant

    High water content soft contact lens
    • Patent number 5,073,616
    • Issue date Dec 17, 1991
    • Hoya Corporation
    • Hideyuki Futamura
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Oxygen-permeable hard contact lens material with excellent impact r...
    • Patent number 5,023,305
    • Issue date Jun 11, 1991
    • Hoya Corporation
    • Shigeharu Onozuka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Soft contact lens
    • Patent number 4,650,843
    • Issue date Mar 17, 1987
    • Hoya Lens Corporation
    • Yuuichi Yokoyama
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...