TREA

Ken-ichi Sato

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical cross-connect system
    • Patent number 5,754,320
    • Issue date May 19, 1998
    • Nippon Telegraph & Telephone Corporation
    • Atsushi Watanabe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Multiwavelength simultaneous monitoring circuit employing arrayed-w...
    • Patent number 5,617,234
    • Issue date Apr 1, 1997
    • Nippon Telegraph & Telephone Corporation
    • Masafumi Koga
    • G02 - OPTICS
  • Information Patent Grant

    Switch gear
    • Patent number 4,956,742
    • Issue date Sep 11, 1990
    • Kabushiki Kaisha Toshiba
    • Kunihiko Takagi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER