Fumiya Omi

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Numazu, JP

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Patents Grantslast 30 patents

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Metal oxide magnetic substance and a magnetic film consisting there...
- Patent number 4,788,095
- Issue date Nov 29, 1988
- Ricoh Company, Ltd.
- Hazime Machida
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Magneto optical recording medium
- Patent number 4,690,861
- Issue date Sep 1, 1987
- Ricoh Co., Ltd.
- Hitoshi Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Metal oxide magnetic substance and a magnetic film consisting there...
- Patent number 4,670,322
- Issue date Jun 2, 1987
- Ricoh Company, Ltd.
- Hitoshi Nakamura
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Magneto-optic recording medium having a metal oxide recording layer
- Patent number 4,670,323
- Issue date Jun 2, 1987
- Ricoh Company, Ltd.
- Hitoshi Nakamura
- G11 - INFORMATION STORAGE