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Eiichi Nakagawa

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  • Kamakura, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Circuit for switching optical paths
    • Patent number 6,934,434
    • Issue date Aug 23, 2005
    • Mitsubishi Denki Kabushiki Kaisha
    • Satoshi Kumayasu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Optical variable attenuator
    • Patent number 6,792,192
    • Issue date Sep 14, 2004
    • Mitsubishi Denki Kabushiki Kaisha
    • Satoshi Kumayasu
    • G02 - OPTICS
  • Information Patent Grant

    Electric power feeding line switching method, electric power feedin...
    • Patent number 6,714,394
    • Issue date Mar 30, 2004
    • Mitsubishi Denki Kabushiki Kaisha
    • Satoshi Kumayasu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Feed line switching circuit and branching unit
    • Patent number 6,563,236
    • Issue date May 13, 2003
    • Mitsubishi Denki Kabushiki Kaisha
    • Satoshi Kumayasu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Light amplifying apparatus
    • Patent number 5,510,930
    • Issue date Apr 23, 1996
    • Mitsubishi Denki Kabushiki Kaisha
    • Kuniaki Motoshima
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Optical-fiber light amplifier
    • Patent number 5,455,704
    • Issue date Oct 3, 1995
    • Mitsubishi Denki Kabushiki Kaisha
    • Takashi Mizuochi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Optical amplifier
    • Patent number 5,367,587
    • Issue date Nov 22, 1994
    • Mitsubishi Denki Kabushiki Kaisha
    • Takashi Mizuochi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Optoelectronics package
    • Patent number 4,989,930
    • Issue date Feb 5, 1991
    • Mitsubishi Denki Kabushiki Kaisha
    • Eiichi Nakagawa
    • G02 - OPTICS

Patents Applicationslast 30 patents