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Ryoichi Kasahara

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  • Atsugi-shi, JP
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    Optical Module
    • Publication number 20230358965
    • Publication date Nov 9, 2023
    • Nippon Telegraph and Telephone Corporation
    • Yuji Fujiwara
    • G02 - OPTICS
  • Information Patent Application

    Optical Module
    • Publication number 20230251432
    • Publication date Aug 10, 2023
    • Nippon Telegraph and Telephone Corporation
    • Yuji Fujiwara
    • G02 - OPTICS
  • Information Patent Application

    Planer Optical Waveguide Device
    • Publication number 20230251549
    • Publication date Aug 10, 2023
    • Nippon Telegraph and Telephone Corporation
    • Asuka Inoue
    • G02 - OPTICS
  • Information Patent Application

    Optical Amplifier
    • Publication number 20230236473
    • Publication date Jul 27, 2023
    • Nippon Telegraph and Telephone Corporation
    • Takushi Kazama
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Apparatus
    • Publication number 20230221617
    • Publication date Jul 13, 2023
    • Nippon Telegraph and Telephone Corporation
    • Takahiro Kashiwazaki
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Device
    • Publication number 20230161223
    • Publication date May 25, 2023
    • Nippon Telegraph and Telephone Corporation
    • Osamu Tadanaga
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Apparatus
    • Publication number 20230152665
    • Publication date May 18, 2023
    • Nippon Telegraph and Telephone Corporation
    • Koji Embutsu
    • G02 - OPTICS
  • Information Patent Application

    Optical Communication System
    • Publication number 20230053856
    • Publication date Feb 23, 2023
    • Nippon Telegraph and Telephone Corporation
    • Takushi Kazama
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Optical Element and Manufacturing Method Thereof
    • Publication number 20220413355
    • Publication date Dec 29, 2022
    • Nippon Telegraph and Telephone Corporation
    • Takeshi Umeki
    • G02 - OPTICS
  • Information Patent Application

    Optical Module
    • Publication number 20220390670
    • Publication date Dec 8, 2022
    • Nippon Telegraph and Telephone Corporation
    • Yuji Fujiwara
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Apparatus
    • Publication number 20220244616
    • Publication date Aug 4, 2022
    • Nippon Telegraph and Telephone Corporation
    • Koji Embutsu
    • G02 - OPTICS
  • Information Patent Application

    Optical Signal Processing Circuit
    • Publication number 20220236622
    • Publication date Jul 28, 2022
    • Nippon Telegraph and Telephone Corporation
    • Takeshi Umeki
    • G02 - OPTICS
  • Information Patent Application

    Optical Waveguide and Manufacturing Method Thereof
    • Publication number 20220236481
    • Publication date Jul 28, 2022
    • Nippon Telegraph and Telephone Corporation
    • Yuji Fujiwara
    • G02 - OPTICS
  • Information Patent Application

    Optical Waveguide Chip
    • Publication number 20220236482
    • Publication date Jul 28, 2022
    • Nippon Telegraph and Telephone Corporation
    • Satomi Katayose
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Optical Element
    • Publication number 20220236621
    • Publication date Jul 28, 2022
    • Nippon Telegraph and Telephone Corporation
    • Takahiro Kashiwazaki
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Element
    • Publication number 20220221770
    • Publication date Jul 14, 2022
    • Nippon Telegraph and Telephone Corporation
    • Osamu Tadanaga
    • G02 - OPTICS
  • Information Patent Application

    Optical Amplifier
    • Publication number 20220200229
    • Publication date Jun 23, 2022
    • Nippon Telegraph and Telephone Corporation
    • Takushi Kazama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL WAVEGUIDE AND MANUFACTURING METHOD THEREOF
    • Publication number 20220179151
    • Publication date Jun 9, 2022
    • Nippon Telegraph and Telephone Corporation
    • Yuji Fujiwara
    • G02 - OPTICS
  • Information Patent Application

    End Structure of a Waveguide
    • Publication number 20220091339
    • Publication date Mar 24, 2022
    • Nippon Telegraph and Telephone Corporation
    • Katsuhiko Hirabayashi
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER AND MANUFACTURING METHOD THEREOF
    • Publication number 20220075120
    • Publication date Mar 10, 2022
    • Nippon Telegraph and Telephone Corporation
    • Katsuhiko Hirabayashi
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Element and Method for Manufacturing Same
    • Publication number 20220019125
    • Publication date Jan 20, 2022
    • Nippon Telegraph and Telephone Corporation
    • Takushi Kazama
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Element and Method for Producing Same
    • Publication number 20220011647
    • Publication date Jan 13, 2022
    • Nippon Telegraph and Telephone Corporation
    • Takahiro Kashiwazaki
    • C30 - CRYSTAL GROWTH
  • Information Patent Application

    Wavelength Conversion Device
    • Publication number 20220004081
    • Publication date Jan 6, 2022
    • Nippon Telegraph and Telephone Corporation
    • Koji Embutsu
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Apparatus
    • Publication number 20210405502
    • Publication date Dec 30, 2021
    • Nippon Telegraph and Telephone Corporation
    • Takeshi Umeki
    • G02 - OPTICS
  • Information Patent Application

    Variable Interference-Fringe-Interval Optical Circuit and Fringe Pr...
    • Publication number 20210302153
    • Publication date Sep 30, 2021
    • Nippon Telegraph and Telephone Corporation
    • Satomi Katayose
    • G01 - MEASURING TESTING
  • Information Patent Application

    Planar Lightwave Circuit and Optical Device
    • Publication number 20210263219
    • Publication date Aug 26, 2021
    • Yuji Fujiwara
    • G02 - OPTICS
  • Information Patent Application

    Filling Resin and Optical Waveguide Circuit Filled with Filling Resin
    • Publication number 20210255395
    • Publication date Aug 19, 2021
    • Nippon Telegraph and Telephone Corporation
    • Katsuhiko Hirabayashi
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    Method for Adjusting Transmitted Wavelength of Signal Light Transmi...
    • Publication number 20210240015
    • Publication date Aug 5, 2021
    • Nippon Telegraph and Telephone Corporation
    • Katsuhiko Hirabayashi
    • G02 - OPTICS
  • Information Patent Application

    Wavelength Conversion Element and Method for Manufacturing Waveleng...
    • Publication number 20210223471
    • Publication date Jul 22, 2021
    • Nippon Telegraph and Telephone Corporation
    • Takahiro Kashiwazaki
    • G02 - OPTICS
  • Information Patent Application

    Optical Signal Transmitter
    • Publication number 20210044358
    • Publication date Feb 11, 2021
    • NIippon Telegraph and Telephone Corporation
    • Takushi Kazama
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE