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Kazutoshi Ashikawa
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Maebashi, JP
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Patents Grants
last 30 patents
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Patent Grant
Magnetic recording and reproducing apparatus and semiconductor inte...
Patent number
6,700,721
Issue date
Mar 2, 2004
Hitachi, Ltd.
Eisaku Saiki
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic recording and reproducing apparatus and a read/write ampli...
Patent number
6,452,736
Issue date
Sep 17, 2002
Hitachi, Ltd.
Eisaku Saiki
G11 - INFORMATION STORAGE
Information
Patent Grant
Data recording and reproducing apparatus and phase locked loop circ...
Patent number
5,867,333
Issue date
Feb 2, 1999
Hitachi, Ltd.
Eisaku Saiki
G11 - INFORMATION STORAGE
Information
Patent Grant
Digital signal processor, error detection method, and recording med...
Patent number
5,774,470
Issue date
Jun 30, 1998
Hitachi, Ltd.
Takushi Nishiya
G11 - INFORMATION STORAGE
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Patent Grant
Information recording/reproducing apparatus having a clock timing e...
Patent number
5,553,104
Issue date
Sep 3, 1996
Hitachi, Ltd.
Terumi Takashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Insulated gate semiconductor device with back-to-back diodes
Patent number
4,831,424
Issue date
May 16, 1989
Hitachi, Ltd.
Isao Yoshida
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method for fabricating vertical MOSFETs
Patent number
4,688,323
Issue date
Aug 25, 1987
Hitachi, Ltd.
Isao Yoshida
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
DMOS With gate protection diode formed over base region
Patent number
4,492,974
Issue date
Jan 8, 1985
Hitachi, Ltd.
Isao Yoshida
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
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Patent Application
Magnetic recording and reproducing apparatus and semiconductor inte...
Publication number
20020171960
Publication date
Nov 21, 2002
Eisaku Saiki
G11 - INFORMATION STORAGE