Inventor
TOKIZONO AKIRA
JP20 patents
⚠️ This page may combine multiple inventors who share the name “TOKIZONO AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
13 patentsUS6219196B1Apr 17, 2001
Method and apparatus for suppressing mechanical resonance in a disk drive storage device using a notch filter
IBM73 citations96
US7035034B2Apr 25, 2006
Data storage device, control device, off-track control method, and control method
IBM26 citations92
US6831809B2Dec 14, 2004
Rotary recording apparatus and method of controlling the apparatus
IBM26 citations92
US6567230B1May 20, 2003
Method and system for performing positioning control of a head actuator in a disk device utilizing a digital filter
IBM25 citations92
US6549349B2Apr 15, 2003
Adaptive vibration control for servo systems in data storage devices
IBM44 citations92
US6377418B1Apr 23, 2002
Digital filter, servo control unit, and disk drive
IBM16 citations84
US6337777B1Jan 8, 2002
Method and apparatus for controlling data write operations
IBM15 citations83
US6218794B1Apr 17, 2001
Spindle motor startup method and apparatus
IBM15 citations80
US6414809B1Jul 2, 2002
Data storage device servo control apparatus and method
IBM13 citations74
US5231625AJul 27, 1993
Optical disk drive wherein a preset reading laser power is used to generate a desired white laser power
IBM15 citations68
US6529344B1Mar 4, 2003
Method and system for compensating a head positioning servo in a storage device
IBM4 citations63
US6324132B1Nov 27, 2001
Method and system for controlling the positioning of a read/write head of a data recording device
IBM4 citations63
US5872677AFeb 16, 1999
Magnetic head position detecting method and magnetic disk apparatus
IBM4 citations63
HITACHI GLOBAL STORAGE TECH
7 patentsUS6754019B2Jun 22, 2004
System and method for implementing a rotary memory device
HITACHI GLOBAL STORAGE TECH46 citations92
US6690537B2Feb 10, 2004
Method and system for controlling the positioning of a read/write head of a data recording device
HITACHI GLOBAL STORAGE TECH16 citations84
US7079337B2Jul 18, 2006
Bi staple flying height detection by BEMF control profile and data integrity problem protection
HITACHI GLOBAL STORAGE TECH12 citations82
US7245457B2Jul 17, 2007
Magnetic disk drive using femto slider and having predetermined linear velocity and gram load configuration
HITACHI GLOBAL STORAGE TECH6 citations72
US6707634B2Mar 16, 2004
Control method and apparatus for reducing the effects of hard disk contamination
HITACHI GLOBAL STORAGE TECH11 citations71
US6930849B2Aug 16, 2005
Disk drive unit, controller for actuator, and method for controlling hard disk drive and disk drive unit
HITACHI GLOBAL STORAGE TECH3 citations54
US7019921B2Mar 28, 2006
Control method and apparatus for reducing the effects of hard disk contamination
HITACHI GLOBAL STORAGE TECH0 citations49