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Hiroyuki Arai

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  • Fujioka-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pencil lead
    • Patent number 11,179,962
    • Issue date Nov 23, 2021
    • Mitsubishi Pencil Company, Limited
    • Hiroyuki Arai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Pencil lead
    • Patent number 9,896,591
    • Issue date Feb 20, 2018
    • Mitsubishi Pencil Company, Limited
    • Hiroyuki Arai
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

  • Information Patent Application

    PENCIL LEAD
    • Publication number 20230398808
    • Publication date Dec 14, 2023
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hiroyuki ARAI
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    PENCIL LEAD
    • Publication number 20190263172
    • Publication date Aug 29, 2019
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hiroyuki Arai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    PENCIL LEAD
    • Publication number 20170174923
    • Publication date Jun 22, 2017
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hiroyuki Arai
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...