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Display device
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Patent number 5,339,011
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Issue date Aug 16, 1994
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Sony Corporation
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Takahiko Tamura
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Parabolic wave generator
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Patent number 5,146,108
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Issue date Sep 8, 1992
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Sony Corporation
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Takahiko Tamura
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H03 - BASIC ELECTRONIC CIRCUITRY
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Dark level restoring circuit
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Patent number 4,631,589
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Issue date Dec 23, 1986
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Sony Corporation
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Masayuki Hongu
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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CRT drive control circuit
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Patent number 4,587,554
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Issue date May 6, 1986
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Sony Corporation
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Takahiko Tamura
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H04 - ELECTRIC COMMUNICATION TECHNIQUE