Haruo Andoh

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording medium
- Patent number 4,946,374
- Issue date Aug 7, 1990
- Hitachi Maxell, Ltd.
- Satoru Yamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Cobalt-containing iron oxide magnetic particles and method for the...
- Patent number 4,857,417
- Issue date Aug 15, 1989
- Hitachi Maxell, Ltd.
- Susumu Kitaoka
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for preparing cobalt-containing iron oxide magnetic particles
- Patent number 4,741,921
- Issue date May 3, 1988
- Hitachi Maxell, Ltd.
- Susumu Kitaoka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium and magnetic particles therefor
- Patent number 4,693,931
- Issue date Sep 15, 1987
- Hitachi Maxell, Ltd.
- Haruo Andoh
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,624,883
- Issue date Nov 25, 1986
- Hitachi Maxell, Ltd.
- Satoru Yamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,364,988
- Issue date Dec 21, 1982
- Hitachi Maxell, Ltd.
- Haruo Andoh
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium and process
- Patent number 4,299,882
- Issue date Nov 10, 1981
- Hitachi Maxell, Ltd.
- Fumio Togawa
- G11 - INFORMATION STORAGE