Masashi Hayama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic powder for magnetic recording medium
- Patent number 4,423,114
- Issue date Dec 27, 1983
- TDK Electronics Co., Ltd.
- Hiroto Saguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium having cobalt adsorbed iron oxide layer
- Patent number 4,420,537
- Issue date Dec 13, 1983
- TDK Electronics Co. Ltd.
- Masashi Hayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,394,420
- Issue date Jul 19, 1983
- TDK Electronics Co., Ltd.
- Kiminori Tamai
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,388,369
- Issue date Jun 14, 1983
- TDK Electronics Co., Ltd.
- Kiminori Tamai
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,379,803
- Issue date Apr 12, 1983
- TDK Electronics Co., Ltd.
- Kiminori Tamai
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of producing magnetic coating material for magnetic recordin...
- Patent number 4,285,825
- Issue date Aug 25, 1981
- TDK Electronics Co., Ltd.
- Yukihiro Isobe
- G11 - INFORMATION STORAGE