Jun Fumioka

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Hadano, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording media and magnetic recording system using the same
- Patent number 6,057,021
- Issue date May 2, 2000
- Hitachi, Ltd.
- Akira Ishikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium, process for producing the same and magne...
- Patent number 5,815,343
- Issue date Sep 29, 1998
- Hitachi, Ltd.
- Akira Ishikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording media and magnetic recording system using the same
- Patent number 5,750,230
- Issue date May 12, 1998
- Hitachi, Ltd.
- Akira Ishikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of producing magnetic disk
- Patent number 5,123,933
- Issue date Jun 23, 1992
- Hitachi, Ltd.
- Yasushi Ito
- B24 - GRINDING POLISHING
Information Patent Grant
Lapping member and lapping tape
- Patent number 5,028,242
- Issue date Jul 2, 1991
- Hitachi, Ltd.
- Yasushi Ito
- B24 - GRINDING POLISHING
Information Patent Grant
Method of producing magnetic disk
- Patent number 4,842,618
- Issue date Jun 27, 1989
- Hitachi, Ltd.
- Yasushi Ito
- B24 - GRINDING POLISHING
Information Patent Grant
Method of producing magnetic disk
- Patent number 4,762,534
- Issue date Aug 9, 1988
- Hitachi, Ltd.
- Yasushi Ito
- B24 - GRINDING POLISHING