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Inventor

Nobumasa Nishiyama

Inventor
Yokohama, JP

Overview

46→
Patents
1987–2020
Patent span
Physics
Primary field (CPC G)

Patents· 46 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 transducer67%
H05KPrinted circuits13%
H01RElectrically-conductive connections6%
Y10TTechnical subjects covered by former us classification3%
A47CChairs1%
A61HPhysical therapy apparatus, e.g. devices for locating or stimulating reflex points in the body1%
A61NElectrotherapy1%
B82YSpecific uses or applications of nanostructures1%
G01RMeasuring electric variables1%
G06FElectric digital data processing1%
PatentTitleYear
10,594,100Flexible type electrical feed-through connector assembly202010,575,424Hermetic sealed electrical connector with high-speed transmission for hard disk drive20209,870,806'Hermetic sealing with high-speed transmission for hard disk drive'20189,841,457'Pseudo flexure for disk drive and method of testing electronic circuit for disk drive'20179,704,520'Flex-HGA connector assembly for hard disk drive'20179,570,096'Read path compensation for SNR and signal transfer'20179,558,790'Hermetic sealing with high-speed transmission for hard disk drive'20179,275,664'Shielded flex cable for use in a disk drive'20169,165,596'Magnetic recording disk drive with multiple preamplifiers and common transmission line with impedance compensation'20159,036,306'Grounding for a hard disk drive suspension tail'20159,036,305'Magnetic recording disk drive with write driver to write head transmission line with multiple segments having different numbers of conductive traces'20158,982,502'Hard disk drive with write assist based on detected conditions'20158,675,311'Interleaved conductor structure with wrap around traces'20148,598,460'Interleaved conductor structure with offset traces'20138,373,940'Magnetic head having a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layer'20138,310,789'Conductor suspension structure and electrical connection assembly for transmitting complementary signals in a hard disk drive'20128,248,732'Head-gimbal assembly including a transmission-line structure for high-density magnetic recording'20128,194,356'Head-stack assembly including heat-dissipation and impedance-matching structure and hard-disk drive using the head-stack assembly'20128,189,281'Magnetic recording disk drive with write driver to write head transmission line having non-uniform sections for optimal write current pulse overshoot'20128,102,628'Disk drive and head assembly having hole sequences'20128,068,313'Microactuator, head gimbal assembly, and disk drive device'20117,983,005'Thin film magnetic head with flying height adjustment capability'20117,969,681'Disk drive and control method thereof'20117,804,663'High frequency interconnect signal transmission lines'20107,724,475'Conductive member, disk drive using same, and conductive member fabricating method'20107,684,153'Magnetic head slider with ground and heater terminal arrangement and magnetic head assembly'20107,489,479'Electrical lead suspension having partitioned air slots'20097,440,217'On the fly write head flyheight detector'20087,417,209'Recording disk drive with reduced noise thermal flyheight control'20087,352,535'Method and apparatus for reducing crosstalk and signal loss in flexing interconnects of an electrical lead suspension'20087,319,573'Magnetic disk drive having a suspension mounted transmission line including read and write conductors and a lower conductor'20086,992,850'Magnetic disk drive reducing influence of rigidity of transmission lines on suspension'20066,069,762'Magnetic recording drive having arrangement for averaging useful life of magnetoresistive effect sensors'20006,014,275'Magnetic recording drive'20005,740,142'Method and apparatus for fast transfer of data in recording and reproducing system'19985,721,942'Personal information display system for serving large capacities of general information to user-designated stations at user-designated times'19985,715,110'Magnetic recording and reproducing apparatus with thermal asperity correction'19985,572,379'Magnetic recording drive having arrangements for average useful life of magnetorestive effects sensors'19965,367,411'Magnetic recording and reproducing apparatus with reproducing head of magnetoresistive type having control of magnetic bias level'19945,337,198'Digital magnetic writing and reading apparatus'19945,307,213'Data reproducing apparatus for eliminating undershoots in the vicinity of the outer edges of a magnetic pole'19945,008,761'Readout circuit in magnetic recording device'19914,907,100'Readout circuit in magnetic recording device'19904,823,208'Multi slice level signal circuit'19894,774,601'Read channel for magnetic recording'19884,644,424'Equalizer used for magnetic storage device'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2000Patents assigned to HITACHI LTD (14)· patent assignee history
1987–1998Based in Hachioji, JP· patent location history
1996–2000Based in Odawara, JP· patent location history
2006–2011Patents assigned to HITACHI GLOBAL STORAGE TECH (10)· patent assignee history
2006–2017Based in Fujisawa, JP· patent location history
2008–2020Based in Yokohama, JP· patent location history
2008–2017Based in Kanagawa, JP· patent location history
2011–2017Patents assigned to NISHIYAMA NOBUMASA (11)· patent assignee history
2011–2013Patents assigned to HITACHI GLOBAL STORAGE TECH NL (8)· patent assignee history
2013–2018Patents assigned to HGST Netherlands BV (10)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD141987–2000
NISHIYAMA NOBUMASAself112011–2017
HGST Netherlands BV102013–2018
HITACHI GLOBAL STORAGE TECH102006–2011
HITACHI GLOBAL STORAGE TECH NL82011–2013
Locations
LocationPatentsSpan
Yokohama, JP182008–2020
Kanagawa, JP122008–2017
Hachioji, JP81987–1998
Odawara, JP51996–2000
Fujisawa, JP22006–2017