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Undesired signal canceller
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Patent number 4,081,837
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Issue date Mar 28, 1978
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Sony Corporation
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Masahiro Tada
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Signal amplifying circuit
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Patent number 4,021,749
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Issue date May 3, 1977
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Sony Corporation
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Yoshio Ishigaki
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H03 - BASIC ELECTRONIC CIRCUITRY
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Transistor biasing circuit
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Patent number 3,987,317
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Issue date Oct 19, 1976
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Sony Corporation
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Masayuki Hongu
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H03 - BASIC ELECTRONIC CIRCUITRY
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Transistor biasing circuit
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Patent number 3,986,058
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Issue date Oct 12, 1976
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Sony Corporation
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Masayuki Hongu
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G05 - CONTROLLING REGULATING
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Gain control circuit
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Patent number 3,968,453
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Issue date Jul 6, 1976
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Sony Corporation
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Masayuki Hongu
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H03 - BASIC ELECTRONIC CIRCUITRY
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Gain control circuit
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Patent number 3,940,708
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Issue date Feb 24, 1976
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Sony Corporation
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Takao Sumi
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H03 - BASIC ELECTRONIC CIRCUITRY