Inventor
YANAGI SHIGENORI
JP117 patents
⚠️ This page may combine multiple inventors who share the name “YANAGI SHIGENORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
48 patentsUS5392273AFeb 21, 1995
Optical storage drive controller with predetermined light source drive values stored in non-volatile memory
FUJITSU LTD145 citations98
US6687194B1Feb 3, 2004
Optical storing apparatus and reproducing method for correcting read errors
FUJITSU LTD74 citations97
US6115338ASep 5, 2000
Optical storage apparatus
FUJITSU LTD53 citations96
US5933397AAug 3, 1999
Optical storage apparatus having track seek control unit providing improved seek performance
FUJITSU LTD51 citations96
US5732055AMar 24, 1998
Optical storage apparatus
FUJITSU LTD52 citations96
US5077719ADec 31, 1991
Optical disk access system
FUJITSU LTD60 citations95
US6633512B1Oct 14, 2003
Magneto-optical information storage apparatus and information storage method with function of updating default value of applied magnetic field
FUJITSU LTD22 citations93
US6515949B2Feb 4, 2003
Storage apparatus
FUJITSU LTD29 citations93
US6275462B1Aug 14, 2001
Optical storage apparatus
FUJITSU LTD29 citations93
US6067284AMay 23, 2000
Recording power adjustment for optical storage apparatus
FUJITSU LTD48 citations93
USRE36590EFeb 29, 2000
Apparatus and method for accurately scanning a light beam across tracks of a recording medium
FUJITSU LTD19 citations93
US5724328AMar 3, 1998
Disk drive apparatus having improved initialization process
FUJITSU LTD19 citations93
US5675562AOct 7, 1997
Seek control method in optical storage device
FUJITSU LTD21 citations93
US5351222ASep 27, 1994
Disk storage apparatus including a single power supply hysteresis comparator having a symmetrical characteristic
FUJITSU LTD36 citations93
US5241522AAug 31, 1993
Optical disk apparatus using transition control between positioner seek control and lens seek control
FUJITSU LTD28 citations93
US5228019AJul 13, 1993
Method and apparatus for measuring speed of movement during beam track movement in optical memory apparatus
FUJITSU LTD21 citations93
US5195067AMar 16, 1993
Track access control system for a disk storage system
FUJITSU LTD38 citations93
US5189653AFeb 23, 1993
Optical disk device eliminating offset of actuator and offset eliminating method used thereby
FUJITSU LTD39 citations93
US5182736AJan 26, 1993
Deceleration control system for positioning an optical head in an optical disk unit
FUJITSU LTD27 citations93
US5175722ADec 29, 1992
Power supply circuit for stabilizing power input to a laser diode
FUJITSU LTD36 citations93
US5150347ASep 22, 1992
Beam track position control apparatus for optical disk apparatus
FUJITSU LTD24 citations93
US5121370AJun 9, 1992
Apparatus and method for accurately scanning a light beam across tracks of a recording medium
FUJITSU LTD27 citations93
US4985882AJan 15, 1991
Track access control system for disk system, having eccentricity correction means
FUJITSU LTD28 citations93
US7426090B2Sep 16, 2008
Storage device, control device, control method, and program
FUJITSU LTD37 citations92
US6249496B1Jun 19, 2001
Optical storage apparatus
FUJITSU LTD23 citations92
US6157599ADec 5, 2000
Optical storage apparatus
FUJITSU LTD45 citations92
US5917785AJun 29, 1999
Disk apparatus
FUJITSU LTD25 citations92
US5901121AMay 4, 1999
Optical storage apparatus having improved eccentricity correction abilities
FUJITSU LTD22 citations92
US5892742AApr 6, 1999
Optical storage apparatus
FUJITSU LTD21 citations92
US5777964AJul 7, 1998
Optical disk apparatus
FUJITSU LTD28 citations92
US5457671AOct 10, 1995
Method and circuit for correcting track zero crossing signal in optical track
FUJITSU LTD25 citations92
US6356515B1Mar 12, 2002
High power controlling system for magneto-optical storage system
FUJITSU LTD52 citations91
US7468854B2Dec 23, 2008
Storage apparatus, control method, control device, and program which can control flying height of head accurate
FUJITSU LTD32 citations90
US6697310B1Feb 24, 2004
Storage apparatus and calibrating method
FUJITSU LTD24 citations90
US5289447AFeb 22, 1994
Track cross signal generation circuit of optical disk device for correctly outputting track cross signal and correctly and stably carrying out seek operation even within high-speed region of beam
FUJITSU LTD35 citations90
US7623314B2Nov 24, 2009
Head control device, storage device, and contact detection method
FUJITSU LTD9 citations84
US7477466B2Jan 13, 2009
Control device and storage device
FUJITSU LTD10 citations84
US7430089B2Sep 30, 2008
Data storage device and write processing method for data storage device
FUJITSU LTD10 citations84
US7321477B2Jan 22, 2008
Disk control apparatus, disk control method, and computer product
FUJITSU LTD14 citations84
US6999260B2Feb 14, 2006
Shock detection device, disk drive, shock detection method, and shock detection program
FUJITSU LTD16 citations84
US6381204B1Apr 30, 2002
Power save mode control method and storage unit
FUJITSU LTD17 citations84
US5481510AJan 2, 1996
Seek control system for optical storage apparatus
FUJITSU LTD19 citations84
US6504802B1Jan 7, 2003
Tracking control method and storage unit
FUJITSU LTD14 citations83
US6920092B2Jul 19, 2005
Seek control method and storage apparatus
FUJITSU LTD14 citations82
US6385144B1May 7, 2002
Storage device with means for efficiently positioning a head on a disk including guard areas lacking position information
FUJITSU LTD16 citations82
US5896354AApr 20, 1999
Optical storage apparatus having switching control circuit for controlling an envelope detecting function in accordance with a medium type or access type
FUJITSU LTD12 citations82
US5920534AJul 6, 1999
Optical disk apparatus
FUJITSU LTD14 citations81
US7397626B2Jul 8, 2008
Storage device, continuous-vibration detecting method, and control apparatus
FUJITSU LTD8 citations74
TOSHIBA STORAGE DEVICE CORP
2 patentsShowing the top 50 of 117 patents by PatentIndex Score.