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Arithmetic operating system
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Patent number 4,580,238
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Issue date Apr 1, 1986
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Hitachi, Ltd.
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Hideo Sawada
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G06 - COMPUTING CALCULATING COUNTING
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Division apparatus
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Patent number 4,546,447
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Issue date Oct 8, 1985
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Hitachi, Ltd.
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Hideo Sawada
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G06 - COMPUTING CALCULATING COUNTING
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Instruction storage
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Patent number 4,521,872
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Issue date Jun 4, 1985
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Hitachi, Ltd.
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Hideo Sawada
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G06 - COMPUTING CALCULATING COUNTING