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Electronic money system
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Patent number 6,032,857
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Issue date Mar 7, 2000
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Hitachi, Ltd.
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Hiroki Kitagawa
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G06 - COMPUTING CALCULATING COUNTING
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IC card reader and writer
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Patent number D411524
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Issue date Jun 29, 1999
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Hitachi, Ltd.
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Hiroki Kitagawa
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D14 - Recording, communication, or information retrieval equipment
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IC card reader and writer
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Patent number D405070
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Issue date Feb 2, 1999
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Hitchi, Ltd.
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Hiroki Kitagawa
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D14 - Recording, communication, or information retrieval equipment