Hitoshi Ichikawa

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Machida, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical recording/reproducing apparatus in which data will not beco...
- Patent number 5,497,364
- Issue date Mar 5, 1996
- Olympus Optical Co., Ltd.
- Hitoshi Ichikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording/reproducing apparatus in which data will not beco...
- Patent number 5,351,227
- Issue date Sep 27, 1994
- Olympus Optical Co., Ltd.
- Hitoshi Ichikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording/reproducing apparatus in which defective sectors...
- Patent number 5,132,956
- Issue date Jul 21, 1992
- Olympus Optical Co., Ltd.
- Hitoshi Ichikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording reproducing device having field applying...
- Patent number 4,837,758
- Issue date Jun 6, 1989
- Olympus Optical Co., Ltd.
- Kazuyasu Motoyama
- G11 - INFORMATION STORAGE