Inventor
Hirotaka Yokoyama
Inventor
Yokosuka, JP
Overview
Patents· 8 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 transducer38%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests29%
Y10TTechnical subjects covered by former us classification29%
C04BLime, magnesia5%
PatentTitleYear
5,494,732'Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation'19965,384,182'Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation'19955,077,146'Magnetic recording medium containing a substituted hexagonal ferrite magnetic powder which includes Zr or Hf and which has a temperature coefficient of coercivity not more than 3.5 oersteds/.degree.C.'19914,837,092'Magnetic recording powder, method of manufacturing thereof and application thereof'19894,699,771'Magnetic recording powder, method of manufacturing thereof and application thereof'19874,636,433'Magnetic powders for magnetic recording media and magnetic recording media employing said magnetic powder therein'19874,447,467'Method and apparatus for perpendicular magnetic recording medium'19844,425,401'Magnetic recording media'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984Patents assigned to TOKYO SHIBAURA ELECTRIC CO (2)· patent assignee history
1984–1996Based in Yokosuka, JP· patent location history
1987–1996Patents assigned to TOSHIBA KK (6)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TOSHIBA KK | 6 | 1987–1996 |
| TOKYO SHIBAURA ELECTRIC CO | 2 | 1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokosuka, JP | 8 | 1984–1996 |