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Magnetic recording medium
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Patent number 5,698,313
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Issue date Dec 16, 1997
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Konica Corporation
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Naoto Yamamoto
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 5,208,091
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Issue date May 4, 1993
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Konica Corporation
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Takafumi Yanagita
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 5,084,336
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Issue date Jan 28, 1992
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Konica Corporation
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Tsutomu Kenpo
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 5,043,212
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Issue date Aug 27, 1991
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Konica Corporation
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Yasuo Ando
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G11 - INFORMATION STORAGE