TREA

Kenji Yamada

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  • Koganei, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drive system for pulse motor
    • Patent number 4,361,410
    • Issue date Nov 30, 1982
    • Citizen Watch Company Ltd.
    • Fumio Nakajima
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Drive control system for stepping motor
    • Patent number 4,283,783
    • Issue date Aug 11, 1981
    • Citizen Watch Company Limited
    • Fumio Nakajima
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,223,522
    • Issue date Sep 23, 1980
    • Citizen Watch Co., Ltd.
    • Yasushi Nomura
    • G04 - HOROLOGY
  • Information Patent Grant

    Driver circuit for electro-mechanical transducer
    • Patent number 4,158,287
    • Issue date Jun 19, 1979
    • Citizen Watch Company Limited
    • Fumio Nakajima
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,150,536
    • Issue date Apr 24, 1979
    • Citizen Watch Company Limited
    • Fumio Nakajima
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,129,981
    • Issue date Dec 19, 1978
    • Citizen Watch Company Limited
    • Yasushi Nomura
    • G04 - HOROLOGY