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Semiconductor memory
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Patent number 5,515,333
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Issue date May 7, 1996
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Hitachi, Ltd.
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Kenji Fujita
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G06 - COMPUTING CALCULATING COUNTING
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Semiconductor memory
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Patent number 5,359,569
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Issue date Oct 25, 1994
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Hitachi Ltd.
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Kenji Fujita
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G06 - COMPUTING CALCULATING COUNTING
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Soldering method
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Patent number 4,821,946
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Issue date Apr 18, 1989
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Hitachi, Ltd.
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Seiichi Abe
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR