LexDanaLexDanabeta
Inventor

Shigekazu Ohtomo

Inventor
Sayama, JP

Overview

9→
Patents
2000–2010
Patent span
Physics
Primary field (CPC G)

Patents· 9 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 transducer64%
B82YSpecific uses or applications of nanostructures21%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
7,821,737'Thin film magnetic head for high density recording and having a leading side magnetic pole piece of variable width at the media facing surface'20107,576,952'Magnetic write head including a magnetic pole piece having a protrusion'20097,310,203'Thin film magnetic head having magnetic pole edge layer for achieving both improvement of recording magnetic field and reduction of unnecessary leakage magnetic field, and method of manufacturing same'20077,142,391'Thin film head, producing method thereof and magnetic disk apparatus'20067,142,392'Thin film head, producing method thereof and magnetic disk apparatus'20067,061,726'Thin film magnetic head'20067,042,677'Recording/producing separated type magnetic head'20066,791,795'Thin film magnetic head having inductive write portion features that provide high recording field strength'20046,101,068'MR composite-type thin-film magnetic head having an upper pole with a high saturation magnetic flux density and an intermediate pole with a high resistivity'2000

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2000Patents assigned to HITACHI METALS LTD (1)· patent assignee history
2000Based in Mooka, JP· patent location history
2004Patents assigned to HITACHI LTD (1)· patent assignee history
2004–2007Based in Sayama, JP· patent location history
2006–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (6)· patent assignee history
2006Patents assigned to HITACHI GLOBAL STORAGE TEHCNOL (1)· patent assignee history
2006Based in Fujisawa, JP· patent location history
2009–2010Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI GLOBAL STORAGE TECH62006–2010
HITACHI GLOBAL STORAGE TEHCNOL12006
HITACHI LTD12004
HITACHI METALS LTD12000
Locations
LocationPatentsSpan
Sayama, JP42004–2007
Saitama, JP22009–2010
Fujisawa, JP22006
Mooka, JP12000