Inventor
Yotsuo Yahisa
Inventor
Odawara, JP
Overview
38→
Patents
1992–2014
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 38 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 transducer41%
Y10TTechnical subjects covered by former us classification29%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests24%
H01FMagnets4%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form1%
C23CCoating metallic material1%
PatentTitleYear
8,703,307'Perpendicular magnetic recording medium and magnetic storage apparatus using the same'20148,592,060'Perpendicular magnetic recording media having low medium noise and systems using the same'20137,876,530'Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same'20117,545,604'Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same'20097,338,725'Magnetic recording medium and magnetic storage device'20087,267,894'Magnetic recording medium and magnetic recording apparatus'20077,261,958'Magnetic recording medium and magnetic recording system using the same'20077,249,405'Method for manufacturing a magnetic medium'20077,163,756'Magnetic recording medium'20077,056,604'Magnetic recording media and magnetic recording system using the same'20067,005,202'Magnetic recording medium and magnetic recording apparatus'20066,887,565'Magnetic recording medium and magnetic storage device'20056,884,521'Magnetic recording medium with controlled grain diameters and method for manufacturing the same'20056,830,837'Magnetic recording medium and magnetic recording apparatus'20046,756,113'Magnetic recording medium and manufacturing method thereof'20046,703,148'Magnetic recording medium and magnetic disk apparatus using the same'20046,692,843'Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage'20046,627,253'Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus'20036,623,873'Magnetic recording medium and magnetic disk apparatus using the same'20036,623,874'Magnetic recording medium and magnetic recording apparatus'20036,596,420'Magnetic recording media and magnetic recording system using the same'20036,544,667'Magnetic recording medium, producing method of the same and magnetic recording system'20036,403,240'Magnetic recording media and magnetic recording system using the same'20026,372,367'Magnetic recording medium, method for producing the same and magnetic recording apparatus using the same'20026,335,103'Magnetic recording media for longitudinal recording'20026,197,367'Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage'20016,096,445'Substrate for a magnetic recording medium, the magnetic recording medium, and a method of producing the same'20006,057,021'Magnetic recording media and magnetic recording system using the same'20006,010,794'Magnetic recording media for longitudinal recording'20005,906,884'Magnetic recording medium'19995,815,343'Magnetic recording medium, process for producing the same and magnetic recording system'19985,750,230'Magnetic recording media and magnetic recording system using the same'19985,723,198'Multi-layered magnetic recording medium and magnetic recording system employing the same'19985,665,478'Magnetic recording media for longitudinal recording'19975,618,639'Magnetic recording medium and magnetic recording apparatus'19975,605,733'Magnetic recording medium, method for its production, and system for its use'19975,236,791'Magnetic recording medium and magnetic storage'19935,143,794'Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2008Patents assigned to HITACHI LTD (24)· patent assignee history
1992–2003Based in Fuchu, JP· patent location history
1997–2014Based in Odawara, JP· patent location history
1997–2000Based in Kokubunji, JP· patent location history
2004–2009Patents assigned to HITACHI GLOBAL STORAGE TECH (9)· patent assignee history
2008Based in Tokyo, JP· patent location history
2009–2013Based in Kanagawa, JP· patent location history
2013–2014Patents assigned to HGST Netherlands BV (2)· patent assignee history
2013–2014Patents assigned to HIROTSUNE AKEMI (2)· patent assignee history
2013–2014Patents assigned to TAMAI ICHIRO (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 24 | 1992–2008 |
| HITACHI GLOBAL STORAGE TECH | 9 | 2004–2009 |
| HGST Netherlands BV | 2 | 2013–2014 |
| HIROTSUNE AKEMI | 2 | 2013–2014 |
| TAMAI ICHIRO | 2 | 2013–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Odawara, JP | 24 | 1997–2014 |
| Fuchu, JP | 5 | 1992–2003 |
| Kanagawa, JP | 3 | 2009–2013 |
| Kokubunji, JP | 3 | 1997–2000 |
| Tokyo, JP | 1 | 2008 |