Inventor

Koji Osafune

Inventor

Ome, JP

Overview

18→

Patents

1987–2009

Patent span

Physics

Primary field (CPC G)

Patents· 18 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer90%

G06KGraphical data reading5%

H03FAmplifiers5%

PatentTitleYear

7,489,468'Method and apparatus for head positioning control in a disk drive'2009 7,057,844'Method and apparatus for head positioning control in a disk drive'2006 7,035,036'Method and apparatus for writing servo data with perpendicular magnetic recording in a disk drive'2006 7,019,936'Method and apparatus for head positioning control in perpendicular magnetic recording of disk drive'2006 7,009,792'Method and apparatus for data reproducing in a disk drive'2006 6,950,259'Disk drive with control of read and write gate signals for read and write operation'2005 6,762,895'Magnetic disk drive and position error signal generation method'2004 6,594,102'Apparatus and method for retracting the head on power down in a disk drive'2003 6,396,652'Apparatus and method for control head unloading on power down in a disk drive'2002 6,046,876'Head signal device with noise immunity function, for use in a disk storage apparatus'2000 5,636,088'Head assembly controlling distortion due to temperature variation and disk apparatus using the head assembly'1997 5,233,481'Magnetic recording and reproducing apparatus'1993 5,038,230'Method of accurately executing read access and magnetic recording/reproducing apparatus therefor'1991 4,931,889'Method and apparatus depending on the selected power source for controlling the positioning of a recording/reproducing apparatus'1990 4,811,126'Recording/reproducing system for a magnetic recording medium including synchronization detecting circuit'1989 4,803,571'Floppy disc magnetic head apparatus compatible with both horizontal and perpendicular recording media'1989 4,745,275'Sensor circuit'1988 4,709,279'Read/write amplifier power control device for a disk apparatus'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2009Patents assigned to TOSHIBA KK (18)· patent assignee history

1987–2003Based in Tokyo, JP· patent location history

1989Based in Nishitama-gun, JP· patent location history

1991Based in Hamura, JP· patent location history

2002–2009Based in Ome, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TOSHIBA KK	18	1987–2009

Locations

Location	Patents	Span
Ome, JP	8	2002–2009
Tokyo, JP	8	1987–2003
Hamura, JP	1	1991
Nishitama-gun, JP	1	1989