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Kouichi Sekiguchi

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  • Asaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Key telephone system
    • Patent number 4,410,767
    • Issue date Oct 18, 1983
    • Iwasaki Tsushinki Kabushiki Kaisha
    • Kouichi Sekiguchi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Key telephone system
    • Patent number 4,254,306
    • Issue date Mar 3, 1981
    • Iwasaki Tsushinki Kabushiki Kaisha
    • Kouichi Sekiguchi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Key telephone system
    • Patent number 4,234,765
    • Issue date Nov 18, 1980
    • Iwasaki Tsushinki Kabushiki Kaisha
    • Kouichi Sekiguchi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE