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Toshihisa OKUBO

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  • Nagahama-shi, Shiga-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Slope gain equalizer
    • Patent number 11,835,766
    • Issue date Dec 5, 2023
    • KOHOKU KOGYO CO., LTD.
    • Toshihisa Okubo
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Interference filter module
    • Patent number 11,598,908
    • Issue date Mar 7, 2023
    • KOHOKU KOGYO CO., LTD.
    • Toshihisa Okubo
    • G02 - OPTICS
  • Information Patent Grant

    Wavelength selective filter
    • Patent number 11,137,547
    • Issue date Oct 5, 2021
    • KOHOKU KOGYO CO., LTD.
    • Takashi Kato
    • G02 - OPTICS

Patents Applicationslast 30 patents

  • Information Patent Application

    SLOPE GAIN EQUALIZER
    • Publication number 20220373741
    • Publication date Nov 24, 2022
    • KOHOKU KOGYO CO., LTD.
    • Toshihisa Okubo
    • G02 - OPTICS
  • Information Patent Application

    WAVELENGTH SELECTIVE FILTER
    • Publication number 20200379179
    • Publication date Dec 3, 2020
    • KOHOKU KOGYO CO., LTD.
    • Takashi KATO
    • G02 - OPTICS
  • Information Patent Application

    INTERFERENCE FILTER MODULE
    • Publication number 20200379151
    • Publication date Dec 3, 2020
    • KOHOKU KOGYO CO., LTD.
    • Toshihisa OKUBO
    • G02 - OPTICS