Nobuo Imada

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Chigasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Compact optical head including two light emitters having parallel o...
- Patent number 6,388,976
- Issue date May 14, 2002
- Hitachi, Ltd.
- Shinji Fujita
- G11 - INFORMATION STORAGE
Information Patent Grant
Compact optical head including two light emitters having parallel o...
- Patent number 6,069,862
- Issue date May 30, 2000
- Hitachi, Ltd.
- Shinji Fujita
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus and optical head thereof
- Patent number 5,872,761
- Issue date Feb 16, 1999
- Hitachi, Ltd.
- Yasuyuki Sugi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus and optical head thereof
- Patent number 5,699,341
- Issue date Dec 16, 1997
- Hitachi, Ltd.
- Yasuyuki Sugi
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording/reproducing optical head producing focusing error signal...
- Patent number 5,404,344
- Issue date Apr 4, 1995
- Hitachi, Ltd.
- Nobuo Imada
- G11 - INFORMATION STORAGE