Inventor
Heigo Ishihara
Inventor
Tokyo, JP
Overview
21→
Patents
1980–2005
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 21 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 digests27%
B82YSpecific uses or applications of nanostructures2%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds2%
PatentTitleYear
6,869,536'Lubricant, magnetic disk and magnetic disk apparatus'20056,555,197'Lubricant, magnetic disk and magnetic disk apparatus'20035,958,542'Thin film magnetic disc and method of manufacturing the disc'19995,820,964'Magnetic disk, and magnetic disk apparatus'19985,543,203'Magnetic recording medium having a protective layer which includes high and low surface energy regions and a lubricant'19965,498,457'Magnetic recording medium having a lubricant layer comprising ionically interbonded fluoropolyethers with acidic and basic terminal groups'19965,180,608'Process for producing a rigid magnetic disk by longitudinally generating standing waves or interference waves in an undried applied magnetic paint'19935,093,211'Magnetic recording medium comprising a surface treatment layer provided on the magnetic layer of specified fluorocarboxylic acid amine salts'19925,073,460'Magnetic recording medium and process for producing the same'19915,034,243'Method for magnetic orientation of magnetic recording medium using Meissner effect of high Tc superconductor'19915,008,128'Process for producing information recording medium'19915,000,982'Magnetic recording medium and method for producing the same'19914,985,295'Magnetic recording medium and method for producing the same'19914,966,797'Process for producing magnetic recording medium, magnetic paint, and magnetic disk'19904,957,825'Magnetic recording medium and process for producing the same'19904,794,035'Magnetic recording medium'19884,722,859'Magnetic recording medium'19884,692,378'Magnetic recording media'19874,238,341'Composition of magnetic recording media'19804,229,312'Method of manufacturing a paint composite for magnetic films'19804,189,508'Process for the preparation of magnetic recording medium'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980–2005Patents assigned to HITACHI LTD (20)· patent assignee history
1980Based in Kokubunji, JP· patent location history
1980Based in Hachioji, JP· patent location history
1987–1996Based in Tokyo, JP· patent location history
1991Patents assigned to HITACHI MAXELL (1)· patent assignee history
1992–1999Based in Nishitama-gun, JP· patent location history
1998–2005Based in Hinode, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 20 | 1980–2005 |
| HITACHI MAXELL | 1 | 1991 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 13 | 1987–1996 |
| Hinode, JP | 3 | 1998–2005 |
| Nishitama-gun, JP | 2 | 1992–1999 |
| Kokubunji, JP | 2 | 1980 |
| Hachioji, JP | 1 | 1980 |