-
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Disk cartridge
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Patent number 4,897,752
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Issue date Jan 30, 1990
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Hitachi Maxell, Ltd.
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Hajime Doi
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,895,758
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Issue date Jan 23, 1990
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Hitachi Maxell, Ltd.
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Akito Sakemoto
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G11 - INFORMATION STORAGE
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Magnetic disc
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Patent number 4,828,925
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Issue date May 9, 1989
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Hitachi Maxell, Ltd.
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Akira Miyake
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G11 - INFORMATION STORAGE
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Recording disc cartridge
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Patent number 4,709,816
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Issue date Dec 1, 1987
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Hitachi Maxell, Ltd.
-
Fujio Matsumoto
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,522,885
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Issue date Jun 11, 1985
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Hitachi Maxell, Ltd.
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Masaya Funahashi
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G11 - INFORMATION STORAGE
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Magnetic recording medium
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Patent number 4,223,361
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Issue date Sep 16, 1980
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Hitachi Maxell, Ltd.
-
Hiroshi Zaitsu
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G11 - INFORMATION STORAGE