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Portable device
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Patent number 7,184,617
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Issue date Feb 27, 2007
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Matsushita Electric Industrial Co., Ltd.
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Tsuguhiro Korenaga
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Magnetic recording medium
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Patent number 4,645,703
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Issue date Feb 24, 1987
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Matsushita Electric Industrial Co., Ltd.
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Takashi Suzuki
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,540,618
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Issue date Sep 10, 1985
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Matsushita Electric Industrial Co., Ltd.
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Takashi Suzuki
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,425,404
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Issue date Jan 10, 1984
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Matsushita Electric Industrial Co., Ltd.
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Takashi Suzuki
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G11 - INFORMATION STORAGE
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