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Takafumi Ohtsuka

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  • Yokohama-shi, JP
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    MODE-DEPENDENT LOSS MEASUREMENT DEVICE AND MODE-DEPENDENT LOSS MEAS...
    • Publication number 20240011866
    • Publication date Jan 11, 2024
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • G01 - MEASURING TESTING
  • Information Patent Application

    GAS LASER AND WASTE HEAT RECOVERY SYSTEM
    • Publication number 20230378712
    • Publication date Nov 23, 2023
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    MULTI-CORE FIBER MODULE AND MULTI-CORE FIBER AMPLIFIER
    • Publication number 20230275390
    • Publication date Aug 31, 2023
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL AMPLIFIER AND OPTICAL COMMUNICATION SYSTEM
    • Publication number 20230006411
    • Publication date Jan 5, 2023
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL MODULE AND METHOD FOR MANUFACTURING OPTICAL MODULE
    • Publication number 20210389525
    • Publication date Dec 16, 2021
    • Sumitomo Electric Industries, Ltd.
    • Eiichiro YAMADA
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL FIBER AMPLIFIER
    • Publication number 20210242655
    • Publication date Aug 5, 2021
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    RADIATION DEVICE AND EMISSION COOLING DEVICE
    • Publication number 20210151654
    • Publication date May 20, 2021
    • Sumitomo Electric Industries, Ltd.
    • Takeshi INOUE
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Application

    OPTICAL AMPLIFIER
    • Publication number 20200381885
    • Publication date Dec 3, 2020
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL CONNECTION STRUCTURE
    • Publication number 20200284988
    • Publication date Sep 10, 2020
    • Sumitomo Electric Industries, Ltd.
    • Masato TANAKA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL FIBER AMPLIFIER
    • Publication number 20190379174
    • Publication date Dec 12, 2019
    • Sumitomo Electric Industries, Ltd.
    • Osamu SHIMAKAWA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    OPTICAL FIBER SENSOR SYSTEM
    • Publication number 20170363461
    • Publication date Dec 21, 2017
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G01 - MEASURING TESTING
  • Information Patent Application

    OPTICAL FIBER SENSOR SYSTEM
    • Publication number 20160238376
    • Publication date Aug 18, 2016
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G02 - OPTICS
  • Information Patent Application

    WAVELENGTH SELECTOR SWITCH
    • Publication number 20160216452
    • Publication date Jul 28, 2016
    • Sumitomo Electric Industries, Ltd.
    • Masaki SUZUKI
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL PATH CONTROL DEVICE
    • Publication number 20160124152
    • Publication date May 5, 2016
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G02 - OPTICS
  • Information Patent Application

    WAVELENGTH SELECTION SWITCH AND CONTROL METHOD FOR PHASE MODULATION...
    • Publication number 20160124155
    • Publication date May 5, 2016
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G02 - OPTICS
  • Information Patent Application

    INTERFEROMETRIC OPTICAL FIBER SENSOR SYSTEM AND INTERFEROMETRIC OPT...
    • Publication number 20160061672
    • Publication date Mar 3, 2016
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G01 - MEASURING TESTING
  • Information Patent Application

    OPTICAL DEVICE
    • Publication number 20150286009
    • Publication date Oct 8, 2015
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL PATH CONTROL DEVICE
    • Publication number 20150260920
    • Publication date Sep 17, 2015
    • Sumitomo Electric Industries, Ltd.
    • Takafumi Ohtsuka
    • G02 - OPTICS
  • Information Patent Application

    OPTICAL UNIT AND OPTICAL DEVICE
    • Publication number 20150098701
    • Publication date Apr 9, 2015
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    WAVELENGTH SELECTIVE SWITCH
    • Publication number 20150078748
    • Publication date Mar 19, 2015
    • Sumitomo Electric Industries, Ltd.
    • Hidehisa TAZAWA
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    WAVELENGTH SELECTIVE SWITCH AND METHOD OF MANUFACTURING SAME
    • Publication number 20150023662
    • Publication date Jan 22, 2015
    • Sumitomo Electric Industries, Ltd.
    • Masaki SUZUKI
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    WAVELENGTH SELECTIVE SWITCH
    • Publication number 20140321796
    • Publication date Oct 30, 2014
    • Sumitomo Electric Industries, Ltd.
    • Takafumi OHTSUKA
    • G02 - OPTICS