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Audio signal subband encoder
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Patent number 5,301,255
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Issue date Apr 5, 1994
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Matsushita Electric Industrial Co., Ltd.
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Kiyotaka Nagai
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Echo canceller
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Patent number 4,672,665
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Issue date Jun 9, 1987
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Matsushita Electric Industrial Co. Ltd.
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Kiyotaka Nagai
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Voice analysis composing method
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Patent number 4,601,052
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Issue date Jul 15, 1986
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Matsushita Electric Industrial Co., Ltd.
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Hiroshi Saito
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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