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Hirotaka SAKUMA

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  • Yokohama-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical fiber
    • Patent number 12,030,804
    • Issue date Jul 9, 2024
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki Tamura
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber
    • Patent number 11,971,571
    • Issue date Apr 30, 2024
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber
    • Patent number 11,740,404
    • Issue date Aug 29, 2023
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber
    • Patent number 11,714,226
    • Issue date Aug 1, 2023
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki Tamura
    • G02 - OPTICS
  • Information Patent Grant

    Optical amplifier and multi-core optical fiber
    • Patent number 11,322,904
    • Issue date May 3, 2022
    • Sumitomo Electric Industries, Ltd.
    • Takemi Hasegawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Optical amplifier and multi-core optical fiber
    • Patent number 11,316,316
    • Issue date Apr 26, 2022
    • Sumitomo Electric Industries, Ltd.
    • Takemi Hasegawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Optical fiber, colored optical fiber, and optical transmission system
    • Patent number 11,280,958
    • Issue date Mar 22, 2022
    • Sumitomo Electric Industries, Ltd.
    • Yuki Kawaguchi
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber
    • Patent number 11,181,684
    • Issue date Nov 23, 2021
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki Tamura
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber, colored optical fiber, and optical transmission system
    • Patent number 11,169,322
    • Issue date Nov 9, 2021
    • Sumitomo Electric Industries, Ltd.
    • Yuki Kawaguchi
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber
    • Patent number 11,048,040
    • Issue date Jun 29, 2021
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber, coated optical fiber, and optical transmission system
    • Patent number 10,989,864
    • Issue date Apr 27, 2021
    • Sumitomo Electric Industries, Ltd.
    • Yuki Kawaguchi
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber preform
    • Patent number 10,723,650
    • Issue date Jul 28, 2020
    • Sumitomo Electric Industries, Ltd.
    • Keisei Morita
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Grant

    Optical fiber
    • Patent number 10,656,326
    • Issue date May 19, 2020
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Grant

    Optical fiber
    • Patent number 10,656,329
    • Issue date May 19, 2020
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Grant

    Optical fiber
    • Patent number 10,550,030
    • Issue date Feb 4, 2020
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber
    • Patent number 10,031,282
    • Issue date Jul 24, 2018
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka Sakuma
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Grant

    Optical fiber
    • Patent number 9,817,184
    • Issue date Nov 14, 2017
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki Tamura
    • C03 - GLASS MINERAL OR SLAG WOOL

Patents Applicationslast 30 patents

  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20240402417
    • Publication date Dec 5, 2024
    • Sumitomo Electric Industries, Ltd.
    • Shin SATO
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER AND OPTICAL FIBER BASE MATERIAL
    • Publication number 20240327271
    • Publication date Oct 3, 2024
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL AMPLIFICATION TRANSMISSION LINE
    • Publication number 20240275117
    • Publication date Aug 15, 2024
    • Sumitomo Electric Industries, Ltd.
    • Shigehiro NAGANO
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    MULTI-CORE OPTICAL FIBER AND CORE IDENTIFICATION METHOD
    • Publication number 20240176063
    • Publication date May 30, 2024
    • Sumitomo Electric Industries, Ltd.
    • Takahiro SUGANUMA
    • G02 - OPTICS
  • Information Patent Application

    GLASS ROD MANUFACTURING DEVICE AND GLASS ROD MANUFACTURING METHOD
    • Publication number 20240025789
    • Publication date Jan 25, 2024
    • Sumitomo Electric Industries, Ltd.
    • Tomomi MORIYA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    MULTICORE OPTICAL FIBER
    • Publication number 20230333311
    • Publication date Oct 19, 2023
    • Sumitomo Electric Industries, Ltd.
    • Takemi HASEGAWA
    • G02 - OPTICS
  • Information Patent Application

    MULTICORE OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM
    • Publication number 20230333312
    • Publication date Oct 19, 2023
    • Sumitomo Electric Industries, Ltd.
    • Takahiro SUGANUMA
    • G02 - OPTICS
  • Information Patent Application

    PRODUCTION METHOD FOR OPTICAL FIBER BASE MATERIAL, AND OPTICAL FIBE...
    • Publication number 20230322605
    • Publication date Oct 12, 2023
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    MULTICORE OPTICAL FIBER
    • Publication number 20230288631
    • Publication date Sep 14, 2023
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20230266523
    • Publication date Aug 24, 2023
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    MULTICORE OPTICAL FIBER
    • Publication number 20230266521
    • Publication date Aug 24, 2023
    • Sumitomo Electric Industries, Ltd.
    • Takemi HASEGAWA
    • G02 - OPTICS
  • Information Patent Application

    METHOD FOR PRODUCING OPTICAL FIBER BASE MATERIAL, AND OPTICAL FIBER...
    • Publication number 20230202904
    • Publication date Jun 29, 2023
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20230101392
    • Publication date Mar 30, 2023
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20220206214
    • Publication date Jun 30, 2022
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki TAMURA
    • G02 - OPTICS
  • Information Patent Application

    METHOD FOR MANUFACTURING OPTICAL FIBER
    • Publication number 20220009817
    • Publication date Jan 13, 2022
    • Sumitomo Electric Industries, Ltd.
    • Yuki KAWAGUCHI
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20210294028
    • Publication date Sep 23, 2021
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20210171390
    • Publication date Jun 10, 2021
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki TAMURA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20200400879
    • Publication date Dec 24, 2020
    • SUMITOMO ELECTRIC INDUSTRIES, LTD.
    • Yuki KAWAGUCHI
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20200393613
    • Publication date Dec 17, 2020
    • Sumitomo Electric Industries, Ltd.
    • Yoshiaki TAMURA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER, COATED OPTICAL FIBER, AND OPTICAL TRANSMISSION SYSTEM
    • Publication number 20200333528
    • Publication date Oct 22, 2020
    • Sumitomo Electric Industries, Ltd.
    • Yuki KAWAGUCHI
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20200292750
    • Publication date Sep 17, 2020
    • Sumitomo Electric Industries, Ltd.
    • Masato SUZUKI
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20200249393
    • Publication date Aug 6, 2020
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20200241198
    • Publication date Jul 30, 2020
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20200024182
    • Publication date Jan 23, 2020
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER
    • Publication number 20190324195
    • Publication date Oct 24, 2019
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER BASE MATERIAL MANUFACTURING METHOD, OPTICAL FIBER BAS...
    • Publication number 20190292089
    • Publication date Sep 26, 2019
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Application

    OPTICAL FIBER, COLORED OPTICAL FIBER, AND OPTICAL TRANSMISSION SYSTEM
    • Publication number 20190278020
    • Publication date Sep 12, 2019
    • Sumitomo Electric Industries, Ltd.
    • Yuki KAWAGUCHI
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL AMPLIFIER AND MULTI-CORE OPTICAL FIBER
    • Publication number 20190207358
    • Publication date Jul 4, 2019
    • Sumitomo Electric Industries, Ltd.
    • Takemi HASEGAWA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    METHOD FOR AXIAL ALIGNMENT OF COUPLED MULTICORE OPTICAL FIBER
    • Publication number 20190113682
    • Publication date Apr 18, 2019
    • Sumitomo Electric Industries, Ltd.
    • Hirotaka SAKUMA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL AMPLIFIER AND MULTI-CORE OPTICAL FIBER
    • Publication number 20190115715
    • Publication date Apr 18, 2019
    • Sumitomo Electric Industries, Ltd.
    • Takemi HASEGAWA
    • H01 - BASIC ELECTRIC ELEMENTS