Masateru Watanabe

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for ensuring operational clearance between a rotating dis...
- Patent number 6,320,836
- Issue date Nov 20, 2001
- Hitachi, Ltd.
- Toshiyasu Hattori
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc recording system
- Patent number 5,418,763
- Issue date May 23, 1995
- Hitachi, Ltd.
- Atsushi Ichikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording medium loading mechanism
- Patent number 5,172,362
- Issue date Dec 15, 1992
- Hirachi, Ltd.
- Toshiyasu Hattori
- G11 - INFORMATION STORAGE
Information Patent Grant
Prism optics stable with respect to wavelength and temperature vari...
- Patent number 5,016,237
- Issue date May 14, 1991
- Hitachi, Ltd.
- Shigeru Nakamura
- G02 - OPTICS
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Correcting for comatic aberration in an optical head of an optical...
- Patent number 4,807,212
- Issue date Feb 21, 1989
- Hitachi, Ltd.
- Tokuya Kaneda
- G11 - INFORMATION STORAGE
Information Patent Grant
Focus error detection apparatus utilizing focusing an front and rea...
- Patent number 4,742,218
- Issue date May 3, 1988
- Hitachi, Ltd.
- Shigeru Nakamura
- G11 - INFORMATION STORAGE