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Speech recognition system
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Patent number 4,620,316
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Issue date Oct 28, 1986
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Hitachi, Ltd.
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Toshikazu Yasue
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Figure displaying device
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Patent number 4,360,884
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Issue date Nov 23, 1982
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Hitachi, Ltd.
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Kunihiro Okada
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Figure displaying device
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Patent number 4,291,306
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Issue date Sep 22, 1981
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Hitachi, Ltd.
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Kazuyuki Kodama
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS