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Automatic attenuation circuit
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Patent number 4,276,604
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Issue date Jun 30, 1981
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Victor Company of Japan, Limited
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Masatsugu Kitamura
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H03 - BASIC ELECTRONIC CIRCUITRY
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Signal processing circuit
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Patent number 4,139,728
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Issue date Feb 13, 1979
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Victor Company of Japan, Ltd.
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Yutaka Haramoto
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Phase-shifting circuit
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Patent number 4,137,507
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Issue date Jan 30, 1979
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Victor Company of Japan, Ltd.
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Yutaka Haramoto
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H03 - BASIC ELECTRONIC CIRCUITRY