Akira Kumagai

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Hitachi, JP

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Patents Grantslast 30 patents

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Magnetic transducer and magnetic recording device utilizing materia...
- Patent number 5,872,690
- Issue date Feb 16, 1999
- Hitachi, Ltd.
- Shigeru Tadokoro
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magnetic disc apparatus with head having magneto-resistance effect
- Patent number 5,726,838
- Issue date Mar 10, 1998
- Hitachi, Ltd.
- Susumu Soeya
- G11 - INFORMATION STORAGE
Information Patent Grant
Thin film magnetic head with mixed crystal structures
- Patent number 5,051,856
- Issue date Sep 24, 1991
- Hitachi, Ltd.
- Shinji Narishige
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Thin film of Ni-Co-Fe ternary alloy and process for producing the same
- Patent number 4,623,439
- Issue date Nov 18, 1986
- Hitachi, Ltd.
- Katsuya Mitsuoka
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method of metallizing sintered ceramics
- Patent number 4,409,079
- Issue date Oct 11, 1983
- Hitachi, Ltd.
- Kunio Miyazaki
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES