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Inventor

Yoshikatsu Fujii

Inventor
Atsugi, JP

Overview

13→
Patents
1979–2012
Patent span
Physics
Primary field (CPC G)

Patents· 13 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 transducer75%
C01BNon-metallic elements6%
C04BLime, magnesia6%
G06FElectric digital data processing6%
Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use6%
PatentTitleYear
8,125,729'Disk drive and error-recovery processing method'20128,111,476'Disk drive spin control'20127,808,737'Magnetic disk drive'20107,486,461'Magnetic disk device and read/write method'20097,375,917'Idle seek calibration method for magnetic disk drive and magnetic disk drive with an intermission calibration'20087,133,242'Magnetic disk drive and magnetic disk drive control'20066,950,264'Disk drive system for controlling seek operations'20056,920,007'Load/unload method and a magnetic disk drive using the method'20056,510,014'Disturbance detection circuit, memory device thereof, and disturbance detection method'20036,407,876'Magnetic disk apparatus having an accelerometer for detecting acceleration in the positioning direction of the magnetic head'20026,335,845'Magnetic disk apparatus having an accelerometer for detecting acceleration in the positioning direction of the magnetic head'20025,986,845'Apparatus for positioning magnetic head and method of the same'19994,146,401'Graphite material having compressibility and recovering property and method for manufacturing the same'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979Based in Hitachi, JP· patent location history
1999–2008Patents assigned to HITACHI LTD (5)· patent assignee history
1999–2008Based in Atsugi, JP· patent location history
2005–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (5)· patent assignee history
2005Based in Tokyo, JP· patent location history
2006–2012Based in Kanagawa, JP· patent location history
2012Patents assigned to FUJII YOSHIKATSU (2)· patent assignee history
2012Patents assigned to HITACHI GLOBAL STORAGE TECH NL (2)· patent assignee history
2012Patents assigned to ISHIBASHI KAZUYUKI (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI GLOBAL STORAGE TECH52005–2010
HITACHI LTD51999–2008
FUJII YOSHIKATSUself22012
HITACHI GLOBAL STORAGE TECH NL22012
ISHIBASHI KAZUYUKI22012
Locations
LocationPatentsSpan
Atsugi, JP61999–2008
Kanagawa, JP52006–2012
Tokyo, JP12005
Hitachi, JP11979