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Sequence controller
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Patent number 4,752,909
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Issue date Jun 21, 1988
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Hitachi, Ltd.
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Tatsuo Fujiwara
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G05 - CONTROLLING REGULATING
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Filtered inputs
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Patent number 4,550,382
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Issue date Oct 29, 1985
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Xerox Corporation
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Anthony M. Federico
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G05 - CONTROLLING REGULATING
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3701113
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Patent number 3,701,113
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Issue date Oct 24, 1972
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G05 - CONTROLLING REGULATING