Inventor

Ikuya Tagawa

Inventor

Kanagawa, JP

Overview

34→

Patents

1999–2019

Patent span

Physics

Primary field (CPC G)

Patents· 34 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 transducer63%

Y10TTechnical subjects covered by former us classification11%

H01FMagnets9%

B82YSpecific uses or applications of nanostructures7%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%

G01RMeasuring electric variables2%

H10NElectric solid-state devices not otherwise provided for2%

PatentTitleYear

10,283,146System and method for reading data recorded on ferroelectric storage medium by means of a near-field transducer2019 9,355,668'Hard disk drive with contact detection using a spin torque oscillator'2016 8,995,088'Heat sink for a spin torque oscillator (STO) in microwave assisted magnetic recording (MAMR)'2015 8,917,465'Implementing spin torque oscillator power-on oscillation checker using ramped STO bias differentiator in microwave-assisted magnetic recording (MAMR) hard disk drives'2014 8,848,317'Magnetic data recording system with mirror image asymmetric magnetic write elements'2014 8,760,779'Energy-assisted magnetic recording head and systems thereof with environmental conditions control'2014 8,643,972'Magnetic storage apparatus, head drive controller, and head drive control method'2014 8,570,684'Implementing integrated spin-torque oscillator and interface bias control for hard disk drives'2013 8,553,507'Write track shift control in shingled-microwave-assisted magnetic recording (MAMR-SMR)'2013 7,830,631'Controlling an overshoot amplitude level based on a recording data pattern in a magnetic disk drive'2010 7,518,825'Thin film magnetic head wherein at least one of a return pole, a first shield, and a second shield has a reverse taper'2009 7,486,485'Perpendicular hard disk drive resistive against external magnetic field'2009 7,468,852'Method of demagnetizing magnetic recording medium and apparatus for carrying out same'2008 7,450,349'Magnetic head with soft magnetic shield and magnetic storage'2008 7,428,115'Magnetic hard disk drive with countermeasure against spike noise'2008 7,408,738'Magnetic recording system with improved magnetic shield'2008 7,016,149'Recording magnetic head and magnetic storage device using the same'2006 6,970,324'Thin film head with nickel-iron alloy non-magnetic substratum between non-magnetic gap layer and upper magnetic pole layer'2005 6,876,524'Magnetoresistive transducer having stronger longitudinal bias field'2005 6,828,046'Soft magnetic film of FeCoMO having a high saturation flux density, a moderate soft magnetism and a uniaxial magnetic anisotropy'2004 6,822,831'Magnetic thin film, magnetic thin film forming method, and recording head'2004 6,813,824'Method of producing thin film magnetic head'2004 6,751,052'Thin film magnetic head with short lower magnetic pole piece'2004 6,720,075'Magnetic recording medium and magnetic recording medium driver for the medium with N-type ferrimagnetic recording layer'2004 6,624,972'Magnetic head, method of manufacturing magnetic head and information recording apparatus'2003 6,614,620'Thin film magnetic head'2003 6,567,239'Thin film magnetic head including a coil insulating resin filler and an insulating metallic layer covering at least partly the insulating resin filler on a datum plane'2003 6,510,024'Magnetic head and method of manufacturing the same'2003 6,507,448'Information recording device having a function of erasing information in a standby state'2003 6,282,776'Magnetic head and method of manufacturing the same'2001 6,094,325'Spin valve head reducing barkhausen noise'2000 6,002,555'Thin film magnetic head'1999 6,001,468'Magnetic head'1999 5,920,449'Recording head for single layer magnetic film perpendicular magnetization medium'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2006Patents assigned to FUJITSU LTD (18)· patent assignee history

1999–2013Based in Kanagawa, JP· patent location history

1999–2006Based in Kawasaki, JP· patent location history

2008–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (7)· patent assignee history

2013–2016Patents assigned to HGST Netherlands BV (7)· patent assignee history

2013–2019Based in Hiratsuka, JP· patent location history

2014Patents assigned to SHIROISHI YOSHIHIRO (2)· patent assignee history

2014Patents assigned to TAGAWA IKUYA (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	18	1999–2006
HGST Netherlands BV	7	2013–2016
HITACHI GLOBAL STORAGE TECH	7	2008–2010
SHIROISHI YOSHIHIRO	2	2014
TAGAWA IKUYAself	2	2014

Locations

Location	Patents	Span
Kanagawa, JP	13	1999–2013
Kawasaki, JP	13	1999–2006
Hiratsuka, JP	8	2013–2019