Koji Osafune

Person

Ome-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for head positioning control in a disk drive
- Patent number 7,489,468
- Issue date Feb 10, 2009
- Kabushiki Kaisha Toshiba
- Yusuke Ohinata
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for head positioning control in a disk drive
- Patent number 7,057,844
- Issue date Jun 6, 2006
- Kabushiki Kaisha Toshiba
- Yuji Sakai
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for writing servo data with perpendicular magn...
- Patent number 7,035,036
- Issue date Apr 25, 2006
- Kabushiki Kaisha Toshiba
- Kazuhito Shimomura
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for head positioning control in perpendicular...
- Patent number 7,019,936
- Issue date Mar 28, 2006
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for data reproducing in a disk drive
- Patent number 7,009,792
- Issue date Mar 7, 2006
- Kabushiki Kaisha Toshiba
- Yuji Sakai
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive with control of read and write gate signals for read and...
- Patent number 6,950,259
- Issue date Sep 27, 2005
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive and position error signal generation method
- Patent number 6,762,895
- Issue date Jul 13, 2004
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus and method for retracting the head on power down in a dis...
- Patent number 6,594,102
- Issue date Jul 15, 2003
- Kabushiki Kaisha Toshiba
- Hiroyuki Kanda
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus and method for control head unloading on power down in a...
- Patent number 6,396,652
- Issue date May 28, 2002
- Kabushiki Kaisha Toshiba
- Hidetoshi Kawachi
- G11 - INFORMATION STORAGE
Information Patent Grant
Head signal device with noise immunity function, for use in a disk...
- Patent number 6,046,876
- Issue date Apr 4, 2000
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Grant
Head assembly controlling distortion due to temperature variation a...
- Patent number 5,636,088
- Issue date Jun 3, 1997
- Kabushiki Kaisha Toshiba
- Kotaro Yamamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproducing apparatus
- Patent number 5,233,481
- Issue date Aug 3, 1993
- Kabushiki Kaisha Toshiba
- Hiroshi Okamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of accurately executing read access and magnetic recording/r...
- Patent number 5,038,230
- Issue date Aug 6, 1991
- Kabushiki Kaisha Toshiba
- Masahiro Kusunoki
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus depending on the selected power source for con...
- Patent number 4,931,889
- Issue date Jun 5, 1990
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording/reproducing system for a magnetic recording medium includ...
- Patent number 4,811,126
- Issue date Mar 7, 1989
- Kabushiki Kaisha Toshiba
- Hiroshi Suzuki
- G11 - INFORMATION STORAGE
Information Patent Grant
Floppy disc magnetic head apparatus compatible with both horizontal...
- Patent number 4,803,571
- Issue date Feb 7, 1989
- Kabushiki Kaisha Toshiba
- Toshiyuki Fujioka
- G11 - INFORMATION STORAGE
Information Patent Grant
Sensor circuit
- Patent number 4,745,275
- Issue date May 17, 1988
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Grant
Read/write amplifier power control device for a disk apparatus
- Patent number 4,709,279
- Issue date Nov 24, 1987
- Kabushiki Kaisha Toshiba
- Masaki Sano
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for head positioning control in a disk drive
- Publication number 20070139811
- Publication date Jun 21, 2007
- Kabushiki Kaisha Toshiba
- Yusuke Ohinata
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for writing servo data with perpendicular magn...
- Publication number 20060082921
- Publication date Apr 20, 2006
- Kabushiki Kaisha Toshiba
- Kazuhito Shimomura
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for servo writing in a disk drive
- Publication number 20050264917
- Publication date Dec 1, 2005
- Kabushiki Kaisha Toshiba
- Koji Yano
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for head positioning control in a disk drive
- Publication number 20050168863
- Publication date Aug 4, 2005
- Kabushiki Kaisha Toshiba
- Yuji Sakai
- G11 - INFORMATION STORAGE
Information Patent Application
Disk drive and magnetic head device for perpendicular magnetic reco...
- Publication number 20050105213
- Publication date May 19, 2005
- Kabushiki Kaisha Toshiba
- Akihiko Takeo
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for writing servo data with perpendicular magn...
- Publication number 20050073771
- Publication date Apr 7, 2005
- Kabushiki Kaisha Toshiba
- Kazuhito Shimomura
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for recovering read errors in a disk drive
- Publication number 20050052770
- Publication date Mar 10, 2005
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for head positioning control in perpendicular...
- Publication number 20050024762
- Publication date Feb 3, 2005
- Kabushiki Kaisha Toshiba
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for data reproducing in a disk drive
- Publication number 20040075930
- Publication date Apr 22, 2004
- Kabushiki Kaisha Toshiba
- Yuji Sakai
- G11 - INFORMATION STORAGE
Information Patent Application
Disk drive with control of read and write gate signals for read and...
- Publication number 20020131191
- Publication date Sep 19, 2002
- Koji Osafune
- G11 - INFORMATION STORAGE
Information Patent Application
Disk drive including preamplifier for perpendicular magnetic record...
- Publication number 20020089773
- Publication date Jul 11, 2002
- Kazuhito Shimomura
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk drive and position error signal generation method
- Publication number 20020034030
- Publication date Mar 21, 2002
- Koji Osafune
- G11 - INFORMATION STORAGE

Koji Osafune

Person

Patents Grantslast 30 patents

Method and apparatus for head positioning control in a disk drive

Method and apparatus for head positioning control in a disk drive

Method and apparatus for writing servo data with perpendicular magn...

Method and apparatus for head positioning control in perpendicular...

Method and apparatus for data reproducing in a disk drive

Disk drive with control of read and write gate signals for read and...

Magnetic disk drive and position error signal generation method

Apparatus and method for retracting the head on power down in a dis...

Apparatus and method for control head unloading on power down in a...

Head signal device with noise immunity function, for use in a disk...

Head assembly controlling distortion due to temperature variation a...

Magnetic recording and reproducing apparatus

Method of accurately executing read access and magnetic recording/r...

Method and apparatus depending on the selected power source for con...

Recording/reproducing system for a magnetic recording medium includ...

Floppy disc magnetic head apparatus compatible with both horizontal...

Sensor circuit

Read/write amplifier power control device for a disk apparatus

Patents Applicationslast 30 patents

Method and apparatus for head positioning control in a disk drive

Method and apparatus for writing servo data with perpendicular magn...

Method and apparatus for servo writing in a disk drive

Method and apparatus for head positioning control in a disk drive

Disk drive and magnetic head device for perpendicular magnetic reco...

Method and apparatus for writing servo data with perpendicular magn...

Method and apparatus for recovering read errors in a disk drive

Method and apparatus for head positioning control in perpendicular...

Method and apparatus for data reproducing in a disk drive

Disk drive with control of read and write gate signals for read and...

Disk drive including preamplifier for perpendicular magnetic record...

Magnetic disk drive and position error signal generation method