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Inventor

Takeo Yamashita

Inventor
Tachikawa, JP

Overview

33→
Patents
1984–2017
Patent span
Physics
Primary field (CPC G)

Patents· 33 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 transducer33%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests12%
Y10TTechnical subjects covered by former us classification7%
G11CStatic stores6%
G06NComputing arrangements based on specific computational models4%
H01FMagnets4%
H03KPulse technique4%
H10DInorganic electric semiconductor devices4%
C23CCoating metallic material3%
C30BSingle-crystal growth3%
PatentTitleYear
9,780,773'Load drive control device'20178,443,840'Excessive pressure release valve and release valve unit having the release valve'20138,421,512'Duty compensation circuit'20137,245,019'Semiconductor device with improved wiring arrangement utilizing a projecting portion and a method of manufacturing the same'20077,154,687'Overshoot current phase/amplitude control for hard disk drive write current'20066,949,478'Oxide film forming method'20056,870,697'Overshoot current phase/amplitude control for hard disk drive write current'20056,146,135'Oxide film forming method'20006,051,851'Semiconductor devices utilizing silicide reaction'20005,973,535'Semiconductor circuit using feedback to latch multilevel data'19995,822,497'Data sorting circuit'19985,818,081'Semiconductor device'19985,784,018'Semiconductor circuit'19985,463,518'Magnetic head and magnetic recording and reproducing apparatus using a superconducting quantum interference device'19955,247,415'Magnetic head having main and auxiliary magnetic paths'19935,159,505'Rotating drum having a center of gravity in registry with an axis of rotation'19925,147,732'Longitudinal magnetic recording media and magnetic memory units'19924,972,285'Amorphous magnetic alloy of Co-Nb-Zr system and magnetic head made from the same'19904,939,045'Magnetic recording medium'19904,851,942'Floating magnetic head having a magnetic core buried in a channel on an air bearing rail'19894,847,715'Magnetic head having short distance between gaps for recording reproducing and erasing'19894,803,338'Magnetic head having improved track width narrowing grooves'19894,774,616'Magnetic head having an integrated recording and playback head and an erasure head'19884,769,729'Magnetic head having ferromagnetic amorphous alloy multi-layered film'19884,766,039'Magnetic head made from amorphous magnetic film'19884,748,089'Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same'19884,745,507'Composite type magnetic head with non-magnetic member in coil mounting portion'19884,731,683'Magnetic recording and reproducing system with composite magnetic head'19884,656,547'Composite type magnetic head for recording and reproducing high frequency signals'19874,610,935'Magnetic film structure'19864,571,652'Magnetic recording and reproducing apparatus'19864,559,572'Magnetic head and method of fabricating same'19854,439,794'Magnetic head'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2013Patents assigned to HITACHI LTD (23)· patent assignee history
1984–1990Based in Hachioji, JP· patent location history
1988–2006Based in Tachikawa, JP· patent location history
1998–2005Patents assigned to OHMI TADAHIRO (5)· patent assignee history
1998–2005Patents assigned to SHIBATA TADASHI (4)· patent assignee history
1998–2005Based in Miyagi, JP· patent location history
2005–2013Patents assigned to YAMASHITA TAKEO (3)· patent assignee history
2005Patents assigned to AOYAMA SHINTARO (1)· patent assignee history
2013Based in Saitama, JP· patent location history
2017Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD231984–2013
OHMI TADAHIRO51998–2005
SHIBATA TADASHI41998–2005
YAMASHITA TAKEOself32005–2013
AOYAMA SHINTARO12005
Locations
LocationPatentsSpan
Tachikawa, JP131988–2006
Hachioji, JP91984–1990
Miyagi, JP51998–2005
Tokyo, JP12017
Saitama, JP12013