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Hajime Urai

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Patents Grantslast 30 patents

  • Information Patent Grant

    Power conversion system
    • Patent number 12,034,379
    • Issue date Jul 9, 2024
    • Hitachi, Ltd.
    • Hajime Urai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 10,916,394
    • Issue date Feb 9, 2021
    • Hitachi, Ltd.
    • Toshiaki Sakuyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 10,699,863
    • Issue date Jun 30, 2020
    • Hitachi, Ltd.
    • Toshiaki Sakuyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 10,354,821
    • Issue date Jul 16, 2019
    • Hitachi, Ltd.
    • Toshiaki Sakuyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 10,256,060
    • Issue date Apr 9, 2019
    • Hitachi, Ltd.
    • Masanao Terada
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 10,199,188
    • Issue date Feb 5, 2019
    • Hitachi, Ltd.
    • Masanao Terada
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 10,157,719
    • Issue date Dec 18, 2018
    • Hitachi, Ltd.
    • Yuki Nakai
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Method for controlling power switching apparatus
    • Patent number 9,959,999
    • Issue date May 1, 2018
    • Hitachi, Ltd.
    • Koichiro Adachi
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Circuit breaker and circuit breaker operating method
    • Patent number 9,899,172
    • Issue date Feb 20, 2018
    • Hitachi, Ltd.
    • Hajime Urai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 9,870,884
    • Issue date Jan 16, 2018
    • Hitachi, Ltd.
    • Masanao Terada
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 9,620,315
    • Issue date Apr 11, 2017
    • Hitachi, Ltd.
    • Masanao Terada
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Switchgear
    • Patent number 9,520,699
    • Issue date Dec 13, 2016
    • Hitachi, Ltd.
    • Hajime Urai
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Gas circuit breaker
    • Patent number 9,336,974
    • Issue date May 10, 2016
    • Hitachi, Ltd.
    • Hideyuki Kotsuji
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Method of current interruption using puffer type gas circuit breake...
    • Patent number 7,339,132
    • Issue date Mar 4, 2008
    • Japan AE Power Systems Corporation
    • Hajime Urai
    • H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

  • Information Patent Application

    Power Conversion System
    • Publication number 20230056704
    • Publication date Feb 23, 2023
    • Hitachi, Ltd
    • Hajime URAI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20210082644
    • Publication date Mar 18, 2021
    • Hitachi, Ltd
    • Hideyuki KOTSUJI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20200279705
    • Publication date Sep 3, 2020
    • Hitachi, Ltd
    • Toshiaki SAKUYAMA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    GAS CIRCUIT BREAKER
    • Publication number 20190287746
    • Publication date Sep 19, 2019
    • Hitachi, Ltd
    • Toshiaki SAKUYAMA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    GAS CIRCUIT BREAKER
    • Publication number 20180277323
    • Publication date Sep 27, 2018
    • Hitachi, Ltd
    • Toshiaki SAKUYAMA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Breaker
    • Publication number 20180226214
    • Publication date Aug 9, 2018
    • Hitachi, Ltd
    • Hideyuki KOTSUJI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20180182578
    • Publication date Jun 28, 2018
    • Hitachi, Ltd
    • Masanao TERADA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    GAS CIRCUIT BREAKER
    • Publication number 20180025868
    • Publication date Jan 25, 2018
    • Hitachi, Ltd
    • Masanao TERADA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    GAS CIRCUIT BREAKER
    • Publication number 20170345593
    • Publication date Nov 30, 2017
    • Hitachi, Ltd
    • Yuki NAKAI
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20170278654
    • Publication date Sep 28, 2017
    • Hitachi, Ltd
    • Masanao TERADA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Method for Controlling Power Switching Apparatus
    • Publication number 20160365206
    • Publication date Dec 15, 2016
    • Hitachi, Ltd
    • Koichiro ADACHI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20160203927
    • Publication date Jul 14, 2016
    • Hitachi, Ltd
    • Masanao TERADA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20150380188
    • Publication date Dec 31, 2015
    • Hitachi, Ltd
    • Toshiaki SAKUYAMA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20150170858
    • Publication date Jun 18, 2015
    • Hitachi, Ltd
    • Hideyuki Kotsuji
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Switchgear
    • Publication number 20150131207
    • Publication date May 14, 2015
    • Hitachi, Ltd
    • Hajime Urai
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Gas Circuit Breaker
    • Publication number 20150091677
    • Publication date Apr 2, 2015
    • Hitachi, Ltd
    • Hajime Urai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Circuit Breaker and Circuit Breaker Operating Method
    • Publication number 20150043121
    • Publication date Feb 12, 2015
    • Hitachi, Ltd
    • Hajime Urai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Method of current interruption using puffer type gas circuit breake...
    • Publication number 20060151438
    • Publication date Jul 13, 2006
    • Hajime Urai
    • H01 - BASIC ELECTRIC ELEMENTS