Hajime Aoi

Person

Fujisawa-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Array disk subsystem
- Patent number 6,243,824
- Issue date Jun 5, 2001
- Hitachi, Ltd.
- Hitoshi Kakuta
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Magnetic recording drive having arrangement for averaging useful li...
- Patent number 6,069,762
- Issue date May 30, 2000
- Hitachi, Ltd.
- Hajime Aoi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording drive
- Patent number 6,014,275
- Issue date Jan 11, 2000
- Hitachi, Ltd.
- Hajime Aoi
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for fast transfer of data in recording and rep...
- Patent number 5,740,142
- Issue date Apr 14, 1998
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Surface atom fabrication method and apparatus
- Patent number 5,689,494
- Issue date Nov 18, 1997
- Hitachi, Ltd.
- Masakazu Ichikawa
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Large capacity magnetic disc apparatus with a particular relationsh...
- Patent number 5,671,107
- Issue date Sep 23, 1997
- Hitachi, Ltd.
- Katsuya Mitsuoka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording drive having arrangements for average useful lif...
- Patent number 5,572,379
- Issue date Nov 5, 1996
- Hitachi, Ltd.
- Hajime Aoi
- G11 - INFORMATION STORAGE
Information Patent Grant
Variable length data in a parallel disk array
- Patent number 5,572,699
- Issue date Nov 5, 1996
- Hitachi, Ltd.
- Yoshihisa Kamo
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method of head positioning and magnetic recording disk drive using...
- Patent number 5,568,331
- Issue date Oct 22, 1996
- Hitachi, Ltd.
- Kyo Akagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Surface atom fabrication method and apparatus
- Patent number 5,416,331
- Issue date May 16, 1995
- Hitachi, Ltd.
- Masakazu Ichikawa
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Array disk subsystem
- Patent number 5,402,428
- Issue date Mar 28, 1995
- Hitachi, Ltd.
- Hitoshi Kakuta
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Digital magnetic writing and reading apparatus
- Patent number 5,337,198
- Issue date Aug 9, 1994
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for error correction and circuit for realizing same
- Patent number 5,325,364
- Issue date Jun 28, 1994
- Hitachi, Ltd.
- Yasuhide Ouchi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Peak detection method and apparatus therefor
- Patent number 5,287,228
- Issue date Feb 15, 1994
- Hitachi, Ltd.
- Hideki Sawaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk apparatus of constant-density recording type, magneti...
- Patent number 5,193,034
- Issue date Mar 9, 1993
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
High speed seek sector servo magnetic disk drive unit
- Patent number 5,132,854
- Issue date Jul 21, 1992
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk device and method of recording/retrieving information
- Patent number 5,109,311
- Issue date Apr 28, 1992
- Hitachi, Ltd.
- Masanobu Hanazono
- G11 - INFORMATION STORAGE
Information Patent Grant
Readout circuit in magnetic recording device
- Patent number 5,008,761
- Issue date Apr 16, 1991
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Readout circuit in magnetic recording device
- Patent number 4,907,100
- Issue date Mar 6, 1990
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Actuator driving apparatus and magnetic disk drive system with a sm...
- Patent number 4,851,939
- Issue date Jul 25, 1989
- Hitachi, Ltd.
- Yosuke Seo
- G11 - INFORMATION STORAGE
Information Patent Grant
Multi slice level signal circuit
- Patent number 4,823,208
- Issue date Apr 18, 1989
- Hitachi, Ltd.
- Yasuhide Ouchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording media for longitudinal recording
- Patent number 4,792,497
- Issue date Dec 20, 1988
- Hitachi, Ltd.
- Hiroyuki Suzuki
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head
- Patent number 4,777,553
- Issue date Oct 11, 1988
- Hitachi, Ltd.
- Hajime Aoi
- G11 - INFORMATION STORAGE
Information Patent Grant
Read channel for magnetic recording
- Patent number 4,774,601
- Issue date Sep 27, 1988
- Hitachi, Ltd.
- Yasuhide Ouchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Circuit for processing waveform of reproduced signal in magnetic re...
- Patent number 4,755,891
- Issue date Jul 5, 1988
- Hitachi, Ltd.
- Yasuhiro Katoh
- G11 - INFORMATION STORAGE
Information Patent Grant
Waveform equalizing circuit
- Patent number 4,651,236
- Issue date Mar 17, 1987
- Hitachi, Ltd.
- Yasuhide Ouchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Equalizer used for magnetic storage device
- Patent number 4,644,424
- Issue date Feb 17, 1987
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Current drive circuit for an induction coil
- Patent number 4,249,219
- Issue date Feb 3, 1981
- Hitachi, Ltd.
- Hajime Aoi
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Magnetic recording disk drive and method for ensuring magnetic reco...
- Publication number 20040109253
- Publication date Jun 10, 2004
- Hitachi Global Storage Technologies Japan, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE

Person

Patents Grantslast 30 patents

Array disk subsystem

Magnetic recording drive having arrangement for averaging useful li...

Magnetic recording drive

Method and apparatus for fast transfer of data in recording and rep...

Surface atom fabrication method and apparatus

Large capacity magnetic disc apparatus with a particular relationsh...

Magnetic recording drive having arrangements for average useful lif...

Variable length data in a parallel disk array

Method of head positioning and magnetic recording disk drive using...

Surface atom fabrication method and apparatus

Array disk subsystem

Digital magnetic writing and reading apparatus

Method for error correction and circuit for realizing same

Peak detection method and apparatus therefor

Magnetic disk apparatus of constant-density recording type, magneti...

High speed seek sector servo magnetic disk drive unit

Magnetic disk device and method of recording/retrieving information

Readout circuit in magnetic recording device

Readout circuit in magnetic recording device

Actuator driving apparatus and magnetic disk drive system with a sm...

Multi slice level signal circuit

Magnetic recording media for longitudinal recording

Magnetic head

Read channel for magnetic recording

Circuit for processing waveform of reproduced signal in magnetic re...

Waveform equalizing circuit

Equalizer used for magnetic storage device

Current drive circuit for an induction coil

Patents Applicationslast 30 patents

Magnetic recording disk drive and method for ensuring magnetic reco...