TREA

Hiroyuki Mutou

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Writing implement
    • Patent number 6,582,144
    • Issue date Jun 24, 2003
    • Mitsubishi Pencil Kabushikikaisha
    • Kazuaki Matsumoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Cap for writing instrument
    • Patent number 5,957,608
    • Issue date Sep 28, 1999
    • Mitsubishi Pencil Kabushiki Kaisha
    • Kazuaki Matsumoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Multiplex writing implement
    • Patent number 5,899,618
    • Issue date May 4, 1999
    • Mitsubishi Pencil Kabushiki Kaisha
    • Seiichi Kobayashi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES