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Method for facility location
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Patent number 5,805,446
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Issue date Sep 8, 1998
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Hitachi, Ltd.
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Tomoko Hatakeyama
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G06 - COMPUTING CALCULATING COUNTING
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Figure retrieval method
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Patent number 5,099,520
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Issue date Mar 24, 1992
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Hitachi Ltd.
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Kazuaki Iwamura
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G06 - COMPUTING CALCULATING COUNTING
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Line recognition
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Patent number 4,550,434
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Issue date Oct 29, 1985
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Hitachi, Ltd.
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Shigeru Shimada
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G06 - COMPUTING CALCULATING COUNTING
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Line recognition method
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Patent number 4,428,077
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Issue date Jan 24, 1984
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Hitachi, Ltd.
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Shigeru Shimada
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G06 - COMPUTING CALCULATING COUNTING
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