TREA

Tsukasa Sasaki

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  • Saitama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mechanical pencil
    • Patent number 6,705,789
    • Issue date Mar 16, 2004
    • Pentel Kabushiki Kaisha
    • Shigeki Maruyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil lead protection pipe with protuberance
    • Patent number 5,085,534
    • Issue date Feb 4, 1992
    • Pentel Kabushiki Kaisha
    • Kamakura Kenichi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    Mechanical pencil
    • Publication number 20020154934
    • Publication date Oct 24, 2002
    • Shigeki Maruyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES