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Inventor

Takayoshi Ohtsu

Inventor
Kanagawa, JP

Overview

30→
Patents
1992–2014
Patent span
Physics
Primary field (CPC G)

Patents· 30 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 transducer59%
B82YSpecific uses or applications of nanostructures20%
Y10TTechnical subjects covered by former us classification8%
G01RMeasuring electric variables6%
H01FMagnets4%
G11CStatic stores2%
H10NElectric solid-state devices not otherwise provided for2%
PatentTitleYear
8,786,986'Head-slider including thin-film magnetic-recording head having reduced thermal protrusion'20148,711,520'Device with a floating head having a heater element'20148,477,455'Noise and particle shield for contact sensor in a slider'20138,431,255'Galvanomagnetic device and magnetic sensor'20138,335,057'CPP magnetoresistive head'20128,284,521'Magnetic head slider'20128,270,109'Magnetic head slider inhibiting a side erase and method of manufacturing thereof'20128,221,192'Magnetic-recording-disk test-head and method of manufacturing a magnetic-recording disk using the magnetic-recording-disk test-head'20128,184,406'Thin film magnetic head having an angled insulating film'20127,983,005'Thin film magnetic head with flying height adjustment capability'20117,911,738'Magnetic head slider with resistive heating film meandering in stacking direction'20117,738,214'Thin film magnetic head'20107,723,982'Testing and manufacturing method of magnetic heads'20107,719,796'Suspension for hard disk drive which enables easy dynamic electric testing'20107,684,153'Magnetic head slider with ground and heater terminal arrangement and magnetic head assembly'20107,652,848'Suspension for magnetic head slider characteristic test'20107,623,323'Magnetoresistive head and read/write separation-type magnetic head'20097,595,952'Magnetic head evaluation apparatus and method for manufacturing magnetic disk drive using the same'20097,558,188'Magnetic head having durability against static electricity with modified time constant'20097,292,416'CPP magneto resistive head with decreased variation in asymmetry and output'20077,230,803'Magnetic head with magnetic domain control structure having anti-ferromagnetic layer and plural magnetic layers'20077,221,544'Magnetic recording apparatus and magnetic head'20077,031,123'Magneto resistive head and magnetic recording apparatus'20066,999,270'Magnetic head and a magnetic disk drive'20066,903,906'Magnetic head with a lamination stack to control the magnetic domain'20056,704,177'Magnetic head with magnetic domain control structure having antiferromagnetic layer and magnetic layer'20046,700,737'Recording and reproducing separation type magnetic head having thin part in upper core or magnetic film and magnetic storage apparatus using the same'20046,697,235'Magnetoresistive head and magnetic recoding/reproducing apparatus using the same'20045,307,214'Magnetic recording apparatus'19945,079,662'Compound magnetic head having a recording head and a reproducing magnetoresitive head integrated therein'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2007Patents assigned to HITACHI LTD (7)· patent assignee history
1994–2014Based in Kanagawa, JP· patent location history
2004–2012Patents assigned to HITACHI GLOBAL STORAGE TECH (14)· patent assignee history
2004Based in Ohi, JP· patent location history
2005–2007Based in Oi, JP· patent location history
2006Based in Fujisawa, JP· patent location history
2007Based in Oimachi, JP· patent location history
2011–2012Patents assigned to HITACHI GLOBAL STORAGE TECH NL (5)· patent assignee history
2012–2014Patents assigned to OHTSU TAKAYOSHI (9)· patent assignee history
2013–2014Patents assigned to HGST Netherlands BV (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI GLOBAL STORAGE TECH142004–2012
OHTSU TAKAYOSHIself92012–2014
HITACHI LTD71992–2007
HITACHI GLOBAL STORAGE TECH NL52011–2012
HGST Netherlands BV42013–2014
Locations
LocationPatentsSpan
Kanagawa, JP201994–2014
Oi, JP42005–2007
Ohi, JP22004
Oimachi, JP12007
Fujisawa, JP12006