TREA

Keiichiro Koga

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  • Tokorozawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,441,826
    • Issue date Apr 10, 1984
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,302,829
    • Issue date Nov 24, 1981
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,302,828
    • Issue date Nov 24, 1981
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timpiece
    • Patent number 4,298,971
    • Issue date Nov 3, 1981
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,292,680
    • Issue date Sep 29, 1981
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic alarm timepiece
    • Patent number 4,270,194
    • Issue date May 26, 1981
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,262,351
    • Issue date Apr 14, 1981
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G04 - HOROLOGY
  • Information Patent Grant

    Electronic timepiece
    • Patent number 4,236,241
    • Issue date Nov 25, 1980
    • Citizen Watch Company Limited
    • Shigeru Morokawa
    • G04 - HOROLOGY