Inventor
Masaaki Futamoto
Inventor
Kanagawa, JP
Overview
71→
Patents
1980–2008
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 71 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%
Y10TTechnical subjects covered by former us classification21%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests19%
B82YSpecific uses or applications of nanostructures8%
H01FMagnets5%
H10NElectric solid-state devices not otherwise provided for4%
G01RMeasuring electric variables4%
H04BTransmission3%
H01JElectric discharge tubes or discharge lamps1%
C22CAlloys1%
PatentTitleYear
7,399,540'Perpendicular magnetic recording media, magnetic recording apparatus'20087,351,445'Magnetic recording media and method of forming them'20087,348,078'Perpendicular magnetic recording medium and magnetic storage apparatus'20087,159,303'Method for manufacturing magnetic head device'20077,157,162'Magnetic recording medium and magnetic recording and reproducing apparatus'20077,147,941'Perpendicular magnetic recording media, magnetic recording apparatus'20067,138,195'Perpendicular magnetic recording media and magnetic storage'20067,097,924'Magnetic recording media and method of forming them'20067,054,120'Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect'20067,026,810'Method for testing or recording servo signal on perpendicular magnetic recording media'20066,926,974'Perpendicular magnetic recording medium and magnetic storage apparatus'20056,894,488'Method for testing or recording servo signal on perpendicular magnetic recording media'20056,852,398'Perpendicular-magnetic recording media and magnetic recording apparatus'20056,846,577'Magnetic recording medium possessing a fluctuation field of not less than 30 Oe'20056,770,389'Perpendicular magnetic recording medium and magnetic recording apparatus'20046,759,148'Perpendicular magnetic recording media and magnetic storage apparatus using the same'20046,716,516'Magnetic recording medium and magnetic recording apparatus using the same'20046,687,099'Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference'20046,686,070'Perpendicular magnetic recording media, magnetic recording apparatus'20046,641,901'Perpendicular-magnetic recording media and magnetic recording apparatus'20036,613,428'Magnetic recording medium and magnetic recording and reproducing apparatus wherein the magnetic layer has a fluctuation of field; A or Hf of not less than 30 Oersteds'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'20036,572,988'Magnetic recording medium and magnetic recording apparatus'20036,562,453'Perpendicular magnetic recording medium and magnetic recording apparatus'20036,544,672'Magnetic recording medium and magnetic storage'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'20036,483,677'Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect'20026,447,936'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'20026,310,748'Magnetic thin film magnetic recording medium'20016,278,593'Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect'20016,251,532'Magnetic recording medium and magnetic storage device using the same'20016,183,893'Perpendicular magnetic recording medium and magnetic storage apparatus using the same'20016,177,208'Magnetic recording system and magnetic recording medium used therefor'20016,083,599'Perpendicular magnetic recording media and magnetic recording and reproducing apparatus using the same'20006,011,674'Magnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositions'20005,919,581'Magnetic recording system and magnetic recording medium used therefor'19995,875,082'Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same'19995,851,643'Magnetic recording media and magnetic recording read-back system which uses such media'19985,766,718'Longitudinal magnetic recording medium and apparatus'19985,759,681'Magnetic recording medium and magnetic recording system using the same'19985,738,927'Perpendicular magnetic recording media and magnetic recording device'19985,736,235'Magnetic recording medium having at least two magnetic layers with easy axes oriented in the same direction'19985,726,837'Multilayer magnetoresistance effect-type magnetic head'19985,685,958'Method of fabricating a magnetic recording medium'19975,650,889'Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium'19975,599,580'Method of fabricating a magnetic recording medium'19975,568,331'Method of head positioning and magnetic recording disk drive using the same'19965,536,585'Magnetic recording medium and fabrication method therefor'19965,390,061'Multilayer magnetoresistance effect-type magnetic head'19955,372,843'Process for producing a magnetic recording medium using a patterned diffusion barrier'19945,368,986'Information recording media, manufacturing method for the same, and information recording method'19945,325,244'Magnetic recording data storage system'19945,231,294'Manganese-aluminum and manganese-silicon magnetic films, and magnetic recording medium'19935,093,822'High-density magnetic recording and optical reproducing apparatus'19925,077,266'Method of forming weak-link Josephson junction, and superconducting device employing the junction'19915,073,460'Magnetic recording medium and process for producing the same'19915,068,158'Magnetic recording medium and process for preparing the same'19914,957,825'Magnetic recording medium and process for producing the same'19904,840,844'Magnetic recording medium'19894,743,491'Perpendicular magnetic recording medium and fabrication method therefor'19884,722,869'Magnetic recording medium'19884,707,756'Perpendicular magnetic recording medium'19874,467,240'Ion beam source'19844,438,371'Source of charged particles beam'19844,193,013'Cathode for an electron source and a method of producing the same'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980–2008Patents assigned to HITACHI LTD (63)· patent assignee history
1980–2004Based in Tsukui, JP· patent location history
1984–2007Based in Kanagawa, JP· patent location history
1987–2002Patents assigned to HITACHI MAXELL (7)· patent assignee history
1998–2003Based in Nishikamo-gun, JP· patent location history
1998Based in Hongchun-gun, KR· patent location history
2002–2008Based in Shiroyama, JP· patent location history
2005–2008Patents assigned to HITACHI GLOBAL STORAGE TECH (7)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 63 | 1980–2008 |
| HITACHI GLOBAL STORAGE TECH | 7 | 2005–2008 |
| HITACHI MAXELL | 7 | 1987–2002 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 37 | 1984–2007 |
| Shiroyama, JP | 18 | 2002–2008 |
| Nishikamo-gun, JP | 7 | 1998–2003 |
| Tsukui, JP | 6 | 1980–2004 |
| Hongchun-gun, KR | 2 | 1998 |