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Electronic clock
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Patent number 7,715,280
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Issue date May 11, 2010
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Citizen Holdings Co., Ltd.
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Akiyoshi Murakami
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electronic timepiece
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Patent number 7,113,452
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Issue date Sep 26, 2006
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Citizen Watch Co., Ltd.
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Kenji Fujita
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G04 - HOROLOGY
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Electronic clock
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Patent number 7,009,914
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Issue date Mar 7, 2006
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Citizen Watch Co., Ltd.
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Haruhiko Higuchi
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G04 - HOROLOGY