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Gouji Sakaoka

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  • Kawasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Side knocking-type writing instrument
    • Patent number 6,758,617
    • Issue date Jul 6, 2004
    • Micro Co., Ltd.
    • Gouji Sakaoka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic mechanical pencil
    • Patent number 5,236,271
    • Issue date Aug 17, 1993
    • Micro Co., Ltd.
    • Gouji Sakaoka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 4,729,684
    • Issue date Mar 8, 1988
    • Micro Co., Ltd.
    • Gouji Sakaoka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil with automatic lead advance
    • Patent number 4,650,359
    • Issue date Mar 17, 1987
    • Pentel Kabushiki Kaisha
    • Gouji Sakaoka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 4,521,126
    • Issue date Jun 4, 1985
    • Pentel Kabushiki Kaisha
    • Gouji Sakaoka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil having guides to match guides on a refill cartridge
    • Patent number 4,240,759
    • Issue date Dec 23, 1980
    • Pentel Kabushiki Kaisha
    • Kenji Matsumoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES