Kazuko Ishitsuka

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Iwai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magneto-optical recording medium capable of recording multiple valu...
- Patent number 6,246,640
- Issue date Jun 12, 2001
- Hitachi Maxell, Ltd.
- Katsusuke Shimazaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head capable of generating multi-stepped external magnetic...
- Patent number 6,101,153
- Issue date Aug 8, 2000
- Hitachi Maxell, Ltd.
- Katsusuke Shimazaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium having a plurality of magnetic layers
- Patent number 6,061,307
- Issue date May 9, 2000
- Hitachi Maxell, Ltd.
- Katsusuke Shimazaki
- G11 - INFORMATION STORAGE