TREA

Takashi Ishijima

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Digital electronic timepiece
    • Patent number 4,123,896
    • Issue date Nov 7, 1978
    • Kabushiki Kaisha Daini Seikosha
    • Kazuhiro Asano
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,104,864
    • Issue date Aug 8, 1978
    • Kabushiki Kaisha Daini Seikosha
    • Takehiro Ishikawa
    • G04 - HOROLOGY