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Multilayer optical disc
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Patent number 8,233,374
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Issue date Jul 31, 2012
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Hitachi Consumer Electronics Co., Ltd.
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Yoshinori Ishikawa
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G11 - INFORMATION STORAGE
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Magnetic head device
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Patent number 6,522,502
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Issue date Feb 18, 2003
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TDK Corporation
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Masashi Shiraishi
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 6,420,058
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Issue date Jul 16, 2002
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TDK Corporation
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Susumu Haratani
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G11 - INFORMATION STORAGE
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Magnetic head device
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Patent number 6,084,746
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Issue date Jul 4, 2000
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TDK Corporation
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Masashi Shiraishi
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 5,698,286
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Issue date Dec 16, 1997
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TDK Corporation
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Tsunehiko Ikarashi
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,794,042
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Issue date Dec 27, 1988
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TDK Corporation
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Yuichi Kubota
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G11 - INFORMATION STORAGE
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Magnetic sheet
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Patent number 4,741,977
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Issue date May 3, 1988
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TDK Corporation
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Keiji Koga
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G11 - INFORMATION STORAGE