Akira Koyama

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Niigata-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Thin-film magnetic head having a high recording density and frequency
- Patent number 7,088,549
- Issue date Aug 8, 2006
- Alps Electric Co., Ltd.
- Hisayuki Yazawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Thin-film magnetic head with narrowed track width and method for ma...
- Patent number 6,882,502
- Issue date Apr 19, 2005
- Alps Electric Co., Ltd.
- Kiyoshi Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Thin-film head for reducing track width, preventing write fringing...
- Patent number 6,704,162
- Issue date Mar 9, 2004
- Alps Electric Co., Ltd.
- Kiyoshi Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording head with inverted trapezoidal mai...
- Patent number 6,697,221
- Issue date Feb 24, 2004
- Alps Electronic Co., Ltd.
- Kiyoshi Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Thin-film magnetic head for reducing track width, preventing write...
- Patent number 6,636,381
- Issue date Oct 21, 2003
- Alps Electric Co., Ltd.
- Kiyoshi Sato
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Thin-film magnetic head for reducing track width, preventing write...
- Publication number 20030072104
- Publication date Apr 17, 2003
- Alps Electric Co., Ltd.
- Kiyoshi Sato
- G11 - INFORMATION STORAGE
Information Patent Application
Method for making perpendicular magnetic recording head with invert...
- Publication number 20020080523
- Publication date Jun 27, 2002
- Alps Electric Co., Ltd.
- Kiyoshi Sato
- G11 - INFORMATION STORAGE
Information Patent Application
Thin-film magnetic head with narrowed track width and method for ma...
- Publication number 20020080522
- Publication date Jun 27, 2002
- Alps Electric Co., Ltd.
- Kiyoshi Sato
- B82 - NANO-TECHNOLOGY