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Line equalizer
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Patent number 4,833,691
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Issue date May 23, 1989
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Hitachi, Ltd.
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Hiroshi Takatori
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Timing phase detector circuit
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Patent number 4,775,989
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Issue date Oct 4, 1988
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Hitachi, Ltd.
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Hiroshi Takatori
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Line equalizer
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Patent number 4,500,999
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Issue date Feb 19, 1985
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Hitachi, Ltd.
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Hiroshi Takatori
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Variable equalizer
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Patent number 4,459,698
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Issue date Jul 10, 1984
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Hitachi, Ltd.
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Osamu Yumoto
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H04 - ELECTRIC COMMUNICATION TECHNIQUE