Inventor · disambiguated record
Masashi Kisaka
Also filed as: KISAKA MASASHI
36 granted patents·405 citations·filing 1992–2009
97Inventor score
Top patents by PatentIndex Score
36 records- 0196US6754021B2Shock resistant, high reliability rotating magnetic storage deviceIBM·Filed 2001·Granted Jun 22, 2004·68 cites·11 claims
- 0293US7315430B2Servo controller in magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 1, 2008·15 cites·10 claims
- 0393US7164550B2Disk drive, positioning method for head, and servo systemHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 16, 2007·16 cites·20 claims
- 0492US7408732B2Shock resistant, high reliability rotating magnetic storage device and methodHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Aug 5, 2008·12 cites·22 claims
- 0591US6490691B1Error recovery in a disk driveIBM·Filed 1999·Granted Dec 3, 2002·66 cites·8 claims
- 0686US7859787B2Disk drive and controlling method thereofHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Dec 28, 2010·6 cites·10 claims
- 0785US7002766B2Shock resistant, high reliability rotating magnetic storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Feb 21, 2006·15 cites·28 claims
- 0882US6958882B2Shock control for rotational recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Oct 25, 2005·16 cites·16 claims
- 0982US5923491ADisk drive servo control system with selectable filtering for reduction of repeatable runoutIBM·Filed 1996·Granted Jul 13, 1999·40 cites·24 claims
- 1080US7317591B2Servo control for magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 8, 2008·4 cites·15 claims
- 1180US7006321B2Data storage apparatus, rotation control apparatus, and rotation control methodHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Feb 28, 2006·14 cites·23 claims
- 1279US7724464B2Recording disk and disk driveHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted May 25, 2010·5 cites·14 claims
- 1378US7864484B2Hard-disk driveHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Jan 4, 2011·3 cites·10 claims
- 1475US7561369B2Drive unitHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Jul 14, 2009·3 cites·3 claims
- 1575US7031096B2Center frequency adjustment for a notch filterIBM·Filed 2003·Granted Apr 18, 2006·10 cites·11 claims
- 1674US7573667B2Servo information write method and apparatusHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Aug 11, 2009·2 cites·7 claims
- 1773US7538964B2Magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted May 26, 2009·2 cites·3 claims
- 1873US7203022B2Disk device, and positioning control method and signal-processing circuit for headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 10, 2007·2 cites·17 claims
- 1972US6075667AMethod and apparatus for determining head positioning in a magnetic disk drive system using first and second gray codesIBM·Filed 1997·Granted Jun 13, 2000·25 cites·4 claims
- 2068US7702012B2Infinite impulse response filter circuit and magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Apr 20, 2010·1 cites·4 claims
- 2167US7474485B2Magnetic disk medium, magnetic disk drive, and method for detecting rotational position of magnetic disk mediumHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 6, 2009·2 cites·12 claims
- 2267US6754031B1Method and apparatus for controlling an access mechanism within a disk driveHITACHI GLOBAL STORAGE TECH·Filed 2000·Granted Jun 22, 2004·6 cites·12 claims
- 2365US6747832B2Disk apparatus and head position control methodHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jun 8, 2004·6 cites·6 claims
- 2456US5822147APosition control apparatus and method with a digital filter and a phase change filter section in a disk storage deviceIBM·Filed 1996·Granted Oct 13, 1998·12 cites·10 claims
- 2554US7626780B2Magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Dec 1, 2009·0 cites·3 claims
- 2654US6470412B1Disk drive, disk control method, data read/write method, data assignment method, and disk storage mediumIBM·Filed 1998·Granted Oct 22, 2002·10 cites·18 claims
- 2751US7136258B2Rotational recording apparatus and control methodHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Nov 14, 2006·1 cites·18 claims
- 2851US5859743AMethod and apparatus for fast positioning a head of a recording deviceIBM·Filed 1997·Granted Jan 12, 1999·8 cites·3 claims
- 2944US5805374AMethod and apparatus for fast positioning a head of a recording deviceIBM·Filed 1996·Granted Sep 8, 1998·5 cites·18 claims
- 3043US5726823AMethod of detecting positioning of a magnetic head, and a magnetic disk deviceIBM·Filed 1996·Granted Mar 10, 1998·6 cites·4 claims
- 3142US5561568AMethod and apparatus for fast positioning a head of a recording deviceIBM·Filed 1992·Granted Oct 1, 1996·9 cites·1 claims
- 3238US5994866AMotor controller and disk drive unitIBM·Filed 1997·Granted Nov 30, 1999·4 cites·28 claims
- 3337US5637970AMotor speed control apparatus and motor speed control methodIBM·Filed 1995·Granted Jun 10, 1997·3 cites·7 claims
- 3434US5812339AMethod and apparatus for controlling the position of an object along a radial direction of a rotating bodyIBM·Filed 1996·Granted Sep 22, 1998·2 cites·14 claims
- 3534US5404254AMethod and apparatus for controlling head positionIBM·Filed 1993·Granted Apr 4, 1995·2 cites·16 claims
- 3633US5608588AMethod for controlling digital closed servo loop system and disk storage apparatus using the systemIBM·Filed 1995·Granted Mar 4, 1997·4 cites·4 claims
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