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Sequence controller
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Patent number 4,969,119
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Issue date Nov 6, 1990
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Hitachi, Ltd.
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Naohiro Kurokawa
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G05 - CONTROLLING REGULATING
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Programmable controller
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Patent number 4,602,325
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Issue date Jul 22, 1986
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Hitachi, Ltd.
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Naohiro Kurokawa
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G05 - CONTROLLING REGULATING
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3886528
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Patent number 3,886,528
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Issue date May 27, 1975
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G05 - CONTROLLING REGULATING
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3827030
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Patent number 3,827,030
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Issue date Jul 30, 1974
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G05 - CONTROLLING REGULATING
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3806877
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Patent number 3,806,877
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Issue date Apr 23, 1974
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G05 - CONTROLLING REGULATING
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3651484
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Patent number 3,651,484
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Issue date Mar 21, 1972
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G05 - CONTROLLING REGULATING
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3624611
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Patent number 3,624,611
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Issue date Nov 30, 1971
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G05 - CONTROLLING REGULATING