TREA

Koichi Sekiguchi

Follow

Person

  • Asaka, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Conference system
    • Patent number 4,726,016
    • Issue date Feb 16, 1988
    • Iwatsu Electric Clock Co., Ltd.
    • Seiya Uchida
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Control signal transmission system for key telephone system
    • Patent number 4,551,583
    • Issue date Nov 5, 1985
    • Telegraph & Telephone Pub. Corp.
    • Koichi Sekiguchi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Synchronization system for key telephone system
    • Patent number 4,314,109
    • Issue date Feb 2, 1982
    • Iwasaki Tsushinki Kabushiki Kaisha
    • Koichi Sekiguchi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Key telephone systems
    • Patent number 4,280,022
    • Issue date Jul 21, 1981
    • Iwasaki Tsushinki Kabushiki Kaisha
    • Koichi Sekiguchi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE