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Akiko HIRAYAMA

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Aqueous ink composition for ballpoint pen
    • Patent number 12,202,990
    • Issue date Jan 21, 2025
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Kousuke Ogura
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Aqueous ink composition for writing instrument
    • Patent number 12,110,401
    • Issue date Oct 8, 2024
    • Mitsubishi Pencil Company, Limited
    • Kousuke Ogura
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Marking pen
    • Patent number 11,987,068
    • Issue date May 21, 2024
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Yusuke Kobayashi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Aqueous ink composition for ballpoint pen
    • Patent number 11,634,601
    • Issue date Apr 25, 2023
    • Mitsubishi Pencil Company, Limited
    • Akiko Hirayama
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Aqueous ink composition for writing instruments
    • Patent number 10,851,252
    • Issue date Dec 1, 2020
    • Mitsubishi Pencil Company, Limited
    • Kana Miyoshi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

  • Information Patent Application

    MARKING PEN
    • Publication number 20230086315
    • Publication date Mar 23, 2023
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Yusuke KOBAYASHI
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    INK COMPOSITION FOR WATER-BASED BALLPOINT PEN
    • Publication number 20230073595
    • Publication date Mar 9, 2023
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Akiko HIRAYAMA
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    INK COMPOSITION FOR WATER-BASED BALLPOINT PEN
    • Publication number 20220169874
    • Publication date Jun 2, 2022
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Takashi HAMAZAKI
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR BALLPOINT PEN
    • Publication number 20220025197
    • Publication date Jan 27, 2022
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Kousuke OGURA
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENT
    • Publication number 20210047529
    • Publication date Feb 18, 2021
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Kousuke OGURA
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR BALLPOINT PEN
    • Publication number 20200165473
    • Publication date May 28, 2020
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Akiko HIRAYAMA
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENTS
    • Publication number 20190211220
    • Publication date Jul 11, 2019
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Kana Miyoshi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...