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Magnetic recording medium
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Patent number 5,811,179
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Issue date Sep 22, 1998
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Matsushita Electric Industrial Co., Ltd.
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Kazunori Sakamoto
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 5,503,922
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Issue date Apr 2, 1996
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Matsushita Electric Industrial Co., Ltd.
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Yukihiro Shimasaki
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G11 - INFORMATION STORAGE
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Method of smoothing magnetic film
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Patent number 4,911,950
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Issue date Mar 27, 1990
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Matsushita Electric Industrial Co., Ltd.
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Tsunenobu Horikoshi
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G11 - INFORMATION STORAGE