Atsumi Watanabe

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Hitachi, JP

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Patents Grantslast 30 patents

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Optical memory medium and its information recording and erasing met...
- Patent number 5,177,717
- Issue date Jan 5, 1993
- Hitachi, Ltd.
- Yoshio Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording method and apparatus using two fight spots
- Patent number 4,841,514
- Issue date Jun 20, 1989
- Hitachi, Ltd.
- Nobuyoshi Tsuboi
- G11 - INFORMATION STORAGE
Information Patent Grant
Beam spot control device using a thin micro lens with an actuator
- Patent number 4,775,967
- Issue date Oct 4, 1988
- Hitachi, Ltd.
- Satoshi Shimada
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal processing apparatus for disc memory devices
- Patent number 4,764,913
- Issue date Aug 16, 1988
- Hitachi, Ltd.
- Hiroshi Sasaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information apparatus and method of recording and erasing i...
- Patent number 4,718,053
- Issue date Jan 5, 1988
- Hitachi, Ltd.
- Yoshio Sato
- G11 - INFORMATION STORAGE
Information Patent Grant
Combustion control method
- Patent number 4,622,922
- Issue date Nov 18, 1986
- Hitachi, Ltd.
- Hisanori Miyagaki
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Method and apparatus for supervising combustion state
- Patent number 4,620,491
- Issue date Nov 4, 1986
- Hitachi, Ltd.
- Mitsuyo Nishikawa
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES