P

Inventor

ZAITSU HIDEKI

JP23 patents
⚠️ This page may combine multiple inventors who share the name “ZAITSU HIDEKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI GLOBAL STORAGE TECH

7 patents
US7646564B2Jan 12, 2010

Perpendicular magnetic recording head for high frequency drive

HITACHI GLOBAL STORAGE TECH27 citations92
US7508619B2Mar 24, 2009

Magnetic head and magnetic disc drive

HITACHI GLOBAL STORAGE TECH40 citations92
US7245447B2Jul 17, 2007

Magnetic read/write apparatus having a write inhibit slice setting circuit

HITACHI GLOBAL STORAGE TECH26 citations92
US6909566B1Jun 21, 2005

Magnetic recording/reproducing device

HITACHI GLOBAL STORAGE TECH30 citations92
US6717760B2Apr 6, 2004

Magnetic disk drive

HITACHI GLOBAL STORAGE TECH6 citations74
US6879460B2Apr 12, 2005

Magnetic recording disk drive

HITACHI GLOBAL STORAGE TECH4 citations62
US7636212B2Dec 22, 2009

Magnetic disk drive with control of sense current of magnetic head

HITACHI GLOBAL STORAGE TECH0 citations41

HITACHI LTD

6 patents
US6635367B2Oct 21, 2003

Magnetic recording medium

HITACHI LTD58 citations95
US6760172B1Jul 6, 2004

Magnetic disk drive

HITACHI LTD18 citations84
US6473254B1Oct 29, 2002

Method and system for compensation of nonlinearity or fluctuation of head-position signal

HITACHI LTD8 citations74
US6404576B1Jun 11, 2002

Method and system for compensation of nonlinearity or fluctuation of head-position signal

HITACHI LTD11 citations74
US6657804B1Dec 2, 2003

Magnetic recording disk drive

HITACHI LTD7 citations73
US7031091B2Apr 18, 2006

Magnetic recording apparatus and method of writing data at low temperature

HITACHI LTD6 citations62

HITACHI GLOBAL STORAGE TECH NL

4 patents
US7920359B2Apr 5, 2011

Magnetic recording apparatus with correlated main magnetic pole-to-shields spacing and main magnetic pole-to-medium layers spacing

HITACHI GLOBAL STORAGE TECH NL21 citations92
US8027113B2Sep 27, 2011

Magnetic read/write device preventing malfunction due to reversal in polarity

HITACHI GLOBAL STORAGE TECH NL3 citations62
US8018672B2Sep 13, 2011

Magnetic recording device and magnetic recording method thereof

HITACHI GLOBAL STORAGE TECH NL6 citations62
US7969678B2Jun 28, 2011

Magnetic disk drive having assisted recording and methods of recording data thereto

HITACHI GLOBAL STORAGE TECH NL3 citations62

TANABE HIROYASU

1 patent
US8797672B2Aug 5, 2014

Dynamic track pitch control for shingled magnetic recording (SMR)

TANABE HIROYASU23 citations91

WESTERN DIGITAL TECHNOLOGIES INC

1 patent
US10748567B1Aug 18, 2020

Data storage device aborting write operation based on accumulated track squeeze metric for adjacent data track

WESTERN DIGITAL TECHNOLOGIES INC17 citations82

HGST Netherlands BV

1 patent
US9025420B1May 5, 2015

Self-controlled laser pulsing for thermally assisted recording

HGST Netherlands BV4 citations71

WESTERN DIGITAL TECH INC

1 patent
US12431161B1Sep 30, 2025

Data storage device with track pitch determination for mitigating effects of servo pattern distortion

WESTERN DIGITAL TECH INC0 citations59

MOCHIZUKI MASAFUMI

1 patent
US8248893B2Aug 21, 2012

Energy-assisted magnetic-recording head having a magnetic-recording assistance element disposed to lower magnetic-recording field for reversing magnetization in a magnetic-recording disk

MOCHIZUKI MASAFUMI1 citations51

ZAITSU HIDEKI

1 patent
US8169729B2May 1, 2012

Magnetic recording/reproducing using a patterned medium

ZAITSU HIDEKI1 citations45