Toshiaki Tsuyoshi

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

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
Information recording medium with clock information therein
- Patent number 5,959,943
- Issue date Sep 28, 1999
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk apparatus
- Patent number 5,953,178
- Issue date Sep 14, 1999
- Hitachi, Ltd.
- Akio Takatsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording apparatus and method for modulated magneto-op...
- Patent number 5,886,958
- Issue date Mar 23, 1999
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto optical recording medium apparatus and method utilizing lig...
- Patent number 5,726,955
- Issue date Mar 10, 1998
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive with sensing current adjustment of MR head
- Patent number 5,719,719
- Issue date Feb 17, 1998
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproducing apparatus with thermal asperity...
- Patent number 5,715,110
- Issue date Feb 3, 1998
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for optimizing the recording and reproducing o...
- Patent number 5,657,176
- Issue date Aug 12, 1997
- Hitachi, Ltd.
- Yoshihiro Moribe
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical data recording apparatus using a sample-servo syste...
- Patent number 5,579,292
- Issue date Nov 26, 1996
- Hitachi, Ltd.
- Seiji Yonezawa
- 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
Magneto-optical data recording system continuously irradiating opti...
- Patent number 5,473,581
- Issue date Dec 5, 1995
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for optimizing the recording and reproducing o...
- Patent number 5,430,581
- Issue date Jul 4, 1995
- Hitachi, Ltd.
- Yoshihiro Moribe
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproducing apparatus with reproducing head...
- Patent number 5,367,411
- Issue date Nov 22, 1994
- Hitachi, Ltd.
- Nobumasa Nishiyama
- G11 - INFORMATION STORAGE
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 of recording and reproduction of information using a recordi...
- Patent number 5,218,599
- Issue date Jun 8, 1993
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- 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
Magneto-optical data recording system
- Patent number 5,170,383
- Issue date Dec 8, 1992
- Hitachi, Ltd.
- Seiji Yonezawa
- 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 drive
- Patent number 5,083,226
- Issue date Jan 21, 1992
- Hitachi, Ltd.
- Kazuo Shiiki
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and associated apparatus and medium for optical recording an...
- Patent number 4,949,325
- Issue date Aug 14, 1990
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Light spot position control system and method by sampled servo
- Patent number 4,872,152
- Issue date Oct 3, 1989
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Composite tracking servo system for optical disc apparatus with tra...
- Patent number 4,866,688
- Issue date Sep 12, 1989
- Hitachi, Ltd.
- Masatoshi Ohtake
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording and reproducing apparatus with tracki...
- Patent number 4,847,822
- Issue date Jul 11, 1989
- Hitachi, Ltd.
- Wasao Takasugi
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for beam-track alignment in optical disk appar...
- Patent number 4,796,246
- Issue date Jan 3, 1989
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Light spot position control system and method by sampling servo
- Patent number 4,785,442
- Issue date Nov 15, 1988
- Hitachi, Ltd.
- Masatoshi Ohtake
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording medium and method for reproducing the same
- Patent number 4,748,611
- Issue date May 31, 1988
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for composite tracking servo system with track...
- Patent number 4,748,609
- Issue date May 31, 1988
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Phase compensation apparatus for an optical information recording a...
- Patent number 4,710,909
- Issue date Dec 1, 1987
- Hitachi, Ltd.
- Toshiaki Tsuyoshi
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for composite wobbled and push-pull tracking s...
- Patent number 4,707,816
- Issue date Nov 17, 1987
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE

Toshiaki Tsuyoshi

Person

Patents Grantslast 30 patents

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

Magnetic recording drive

Information recording medium with clock information therein

Magnetic disk apparatus

Information recording apparatus and method for modulated magneto-op...

Magneto optical recording medium apparatus and method utilizing lig...

Magnetic disk drive with sensing current adjustment of MR head

Magnetic recording and reproducing apparatus with thermal asperity...

Method and apparatus for optimizing the recording and reproducing o...

Magneto-optical data recording apparatus using a sample-servo syste...

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

Magneto-optical data recording system continuously irradiating opti...

Method and apparatus for optimizing the recording and reproducing o...

Magnetic recording and reproducing apparatus with reproducing head...

Digital magnetic writing and reading apparatus

Method of recording and reproduction of information using a recordi...

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

Magneto-optical data recording system

High speed seek sector servo magnetic disk drive unit

Magnetic disk drive

Method and associated apparatus and medium for optical recording an...

Light spot position control system and method by sampled servo

Composite tracking servo system for optical disc apparatus with tra...

Optical information recording and reproducing apparatus with tracki...

Method and apparatus for beam-track alignment in optical disk appar...

Light spot position control system and method by sampling servo

Information recording medium and method for reproducing the same

Method and apparatus for composite tracking servo system with track...

Phase compensation apparatus for an optical information recording a...

Method and apparatus for composite wobbled and push-pull tracking s...