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Primer composition
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Patent number 4,900,362
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Issue date Feb 13, 1990
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Shin-Etsu Chemical Co., Ltd.
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Hironao Fujiki
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Magnetic recording medium
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Patent number 4,501,801
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Issue date Feb 26, 1985
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Sony Corporation
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Shigeo Kimura
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,431,703
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Issue date Feb 14, 1984
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Sony Corporation
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Masashi Somezawa
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