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Home-bus-information system
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Patent number 4,989,081
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Issue date Jan 29, 1991
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Sony Corporation
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Masayuki Miyagawa
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Ghost cancelling system
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Patent number 4,667,241
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Issue date May 19, 1987
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Sony Corporation
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Junya Saito
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Ghost cancelling system
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Patent number 4,357,631
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Issue date Nov 2, 1982
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Sony Corporation
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Kimitake Utsunomiya
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Ghost cancelling system
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Patent number 4,344,089
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Issue date Aug 10, 1982
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Sony Corporation
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Kimitake Utsunomiya
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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