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Takashi Nara
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Takasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Disk device and method of generating signal representing head
Patent number
7,430,085
Issue date
Sep 30, 2008
Hitachi Global Storage Technologies Japan, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Grant
Disk device and method of generating signal representing head
Patent number
7,139,143
Issue date
Nov 21, 2006
Hitachi, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Grant
Apparatus for information recording and reproducing
Patent number
6,980,385
Issue date
Dec 27, 2005
Hitachi Video and Information System, Inc.
Takatoshi Kato
G11 - INFORMATION STORAGE
Information
Patent Grant
Apparatus for information recording and reproducing
Patent number
6,791,776
Issue date
Sep 14, 2004
Hitachi, Ltd.
Takatoshi Kato
G11 - INFORMATION STORAGE
Information
Patent Grant
Disk device and method of generating signal representing head
Patent number
6,563,656
Issue date
May 13, 2003
Hitachi, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Grant
Disk device and method of generating signal representing head
Patent number
6,445,522
Issue date
Sep 3, 2002
Hitachi, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Grant
Data encoding method for digital data recording and data recording...
Patent number
6,373,407
Issue date
Apr 16, 2002
Hitachi, Ltd.
Takushi Nishiya
G11 - INFORMATION STORAGE
Information
Patent Grant
Time sharing analog filters control method and magnetic disk system
Patent number
6,326,838
Issue date
Dec 4, 2001
Hitachi, Ltd.
Hiroshi Kimura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Signal processing apparatus and a disk control apparatus, with head...
Patent number
6,172,828
Issue date
Jan 9, 2001
Hitachi, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Grant
Digital signal decoding apparatus and a decoding method used therein
Patent number
5,940,416
Issue date
Aug 17, 1999
Hitachi Ltd.
Takushi Nishiya
G11 - INFORMATION STORAGE
Information
Patent Grant
Digital information signal reproducing circuit and digital informat...
Patent number
5,937,020
Issue date
Aug 10, 1999
Hitachi, Ltd.
Kenichi Hase
G11 - INFORMATION STORAGE
Information
Patent Grant
Signal processing delay circuit
Patent number
5,878,097
Issue date
Mar 2, 1999
Hitachi, Ltd.
Kenichi Hase
G11 - INFORMATION STORAGE
Information
Patent Grant
System for reproducing high-density magnetic record data with viter...
Patent number
5,844,741
Issue date
Dec 1, 1998
Hitachi, Ltd.
Hideyuki Yamakawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Signal processing delay circuit
Patent number
5,636,254
Issue date
Jun 3, 1997
Hitachi, Ltd.
Kenichi Hase
G11 - INFORMATION STORAGE
Information
Patent Grant
Voltage-controlled filter circuit, a semiconductor integrated circu...
Patent number
5,614,860
Issue date
Mar 25, 1997
Hitachi, Ltd.
Katsumi Osaki
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Active filter control apparatus
Patent number
5,572,163
Issue date
Nov 5, 1996
Hitachi, Ltd.
Hiroshi Kimura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Semiconductor integrated circuit device including high-speed operat...
Patent number
5,398,047
Issue date
Mar 14, 1995
Hitachi, Ltd.
Takashi Nara
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Patents Applications
last 30 patents
Information
Patent Application
Disk device and method of generating signal representing head
Publication number
20060285238
Publication date
Dec 21, 2006
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Application
Apparatus for information recording and reproducing
Publication number
20050041316
Publication date
Feb 24, 2005
Takatoshi Kato
G11 - INFORMATION STORAGE
Information
Patent Application
Disk device and method of generating signal re
Publication number
20030179479
Publication date
Sep 25, 2003
Hitachi, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Application
Disk device and method of generating signal representing head
Publication number
20020196570
Publication date
Dec 26, 2002
Hitachi, Ltd.
Motoyasu Tsunoda
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor apparatus
Publication number
20020041242
Publication date
Apr 11, 2002
Hideaki Takahashi
G11 - INFORMATION STORAGE
Information
Patent Application
Apparatus for information recording and reproducing
Publication number
20010043416
Publication date
Nov 22, 2001
Takatoshi Kato
G11 - INFORMATION STORAGE