LexDanaLexDanabeta
Inventor

Yoshiyuki Hirayama

Inventor
Kodaira, JP

Overview

61→
Patents
1984–2018
Patent span
Physics
Primary field (CPC G)

Patents· 61 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 transducer36%
Y10TTechnical subjects covered by former us classification22%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%
B82YSpecific uses or applications of nanostructures5%
H04BTransmission4%
G03GElectrography3%
H04NPictorial communication, e.g. television2%
H01FMagnets1%
H05KPrinted circuits1%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation1%
PatentTitleYear
9,968,017Electromagnetic shielding tube20189,595,282'Magnetic recording medium having a L10-type ordered alloy'20179,275,672'Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive'20168,883,327'Microwave assisted magnetic recording medium and information recording apparatus using the same'20148,873,179'Bit-patterned media magnetic recording disk with two sizes of dots and imprint template made with directed self-assembly (DSA) of block copolymers'20148,771,849'Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the same'20148,709,618'Magnetic storage apparatus'20147,875,373'Perpendicular magnetic recording medium and magnetic storage apparatus using the same'20117,701,667'Perpendicular magnetic recording medium and magnetic storage apparatus using the same'20107,651,795'Perpendicular magnetic recording medium and manufacturing of the same'20107,641,989'Perpendicular magnetic recording medium for high density recording and manufacturing of the same'20107,625,646'Perpendicular magnetic recording medium and method of manufacturing it'20097,618,722'Perpendicular magnetic recording media and magnetic storage apparatus using the same'20097,534,507'Perpendicular magnetic recording medium for high density magnetic recording and manufacturing of the same'20097,510,789'Perpendicular magnetic recording media'20097,399,540'Perpendicular magnetic recording media, magnetic recording apparatus'20087,368,185'Perpendicular magnetic recording media and magnetic storage apparatus using the same'20087,261,958'Magnetic recording medium and magnetic recording system using the same'20077,249,405'Method for manufacturing a magnetic medium'20077,147,941'Perpendicular magnetic recording media, magnetic recording apparatus'20067,033,686'Perpendicular magnetic recording medium and method of manufacturing it'20067,026,810'Method for testing or recording servo signal on perpendicular magnetic recording media'20066,943,814'Gradation display method'20056,916,557'Perpendicular magnetic recording media'20056,894,488'Method for testing or recording servo signal on perpendicular magnetic recording media'20056,884,521'Magnetic recording medium with controlled grain diameters and method for manufacturing the same'20056,852,398'Perpendicular-magnetic recording media and magnetic recording apparatus'20056,830,837'Magnetic recording medium and magnetic recording apparatus'20046,770,389'Perpendicular magnetic recording medium and magnetic recording apparatus'20046,716,516'Magnetic recording medium and magnetic recording apparatus using the same'20046,686,070'Perpendicular magnetic recording media, magnetic recording apparatus'20046,641,901'Perpendicular-magnetic recording media and magnetic recording apparatus'20036,607,849'Magnetic recording medium and magnetic recording apparatus using the same'20036,592,976'Magnetic recording medium and magnetic recording apparatus using the same'20036,562,453'Perpendicular magnetic recording medium and magnetic recording apparatus'20036,541,125'Magnetic recording medium'20036,534,164'Magnetic recording medium and magnetic recording apparatus using the same'20036,528,149'Perpendicular-magnetic recording media and magnetic recording apparatus'20036,447,936'Magnetic recording medium and magnetic recording apparatus using the same'20026,403,203'Magnetic recording medium and magnetic recording apparatus using the same'20026,383,667'Magnetic recording medium'20026,349,008'Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same'20026,183,893'Perpendicular magnetic recording medium and magnetic storage apparatus using the same'20016,083,599'Perpendicular magnetic recording media and magnetic recording and reproducing apparatus using the same'20005,926,579'Image processing apparatus capable of properly determining density of a background portion'19995,875,082'Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same'19995,808,449'Method and apparatus for detecting islanding operation of dispersed generator'19985,738,927'Perpendicular magnetic recording media and magnetic recording device'19985,701,505'Image data parallel processing apparatus'19975,685,958'Method of fabricating a magnetic recording medium'19975,608,230'Strained superlattice semiconductor photodetector having a side contact structure'19975,599,580'Method of fabricating a magnetic recording medium'19975,572,043'Schottky junction device having a Schottky junction of a semiconductor and a metal'19965,557,508'High-density circuit module and method of producing the same'19965,536,585'Magnetic recording medium and fabrication method therefor'19965,465,307'Parallel processing apparatus for recognizing an area marked with a closed loop'19955,375,137'Semiconductor laser device featuring group III and IV compounds doped with amphoteric impurity to vary electrical resistance according to direction of crystal plane'19945,231,294'Manganese-aluminum and manganese-silicon magnetic films, and magnetic recording medium'19934,970,550'Copying system capable of designating a copying area'19904,533,234'Automatic density control method for a photocopying machine'19854,460,270'Automatic exposure control for a photocopying machine'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2005Patents assigned to FUJI XEROX CO LTD (7)· patent assignee history
1993–2016Patents assigned to HITACHI LTD (27)· patent assignee history
1993–2017Based in Kokubunji, JP· patent location history
1994–2018Patents assigned to FURUKAWA ELECTRIC CO LTD (4)· patent assignee history
1994–1997Based in Yokohama, JP· patent location history
1995–2005Based in Saitama, JP· patent location history
1996–2008Based in Kodaira, JP· patent location history
2004–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (16)· patent assignee history
2008–2014Based in Tokyo, JP· patent location history
2014–2017Patents assigned to HGST Netherlands BV (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD271993–2016
HITACHI GLOBAL STORAGE TECH162004–2010
FUJI XEROX CO LTD71984–2005
FURUKAWA ELECTRIC CO LTD41994–2018
HGST Netherlands BV42014–2017
Locations
LocationPatentsSpan
Kodaira, JP241996–2008
Kokubunji, JP151993–2017
Tokyo, JP92008–2014
Yokohama, JP41994–1997
Saitama, JP31995–2005