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Portable electronic device
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Issue date May 5, 2009
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Panasonic Corporation
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Kazuki Honda
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Speaker
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Patent number D533163
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Issue date Dec 5, 2006
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Matsushita Electric Industrial Co., Ltd.
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Tomoyasu Takase
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Sounder
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Patent number 5,889,732
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Issue date Mar 30, 1999
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Matsushita Electric Industrial Co., Ltd.
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Takanori Fukuyama
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G10 - MUSICAL INSTRUMENTS ACOUSTICS