Inventor
Kunio Wakai
Inventor
Ibaraki, JP
Overview
15→
Patents
1988–2002
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 15 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 transducer27%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests22%
Y10TTechnical subjects covered by former us classification20%
C23CCoating metallic material15%
H01JElectric discharge tubes or discharge lamps7%
B66BElevators2%
C04BLime, magnesia2%
C09DCoating compositions, e.g. paints, varnishes or lacquers2%
H01FMagnets2%
PatentTitleYear
6,367,411'Plasma CVD apparatus'20026,312,524'Plasma CVD apparatus'20016,044,792'Plasma CVD apparatus'20005,496,620'Magnetic recording medium'19965,073,449'Magnetic recording medium and method for producing the same'19915,068,144'Perpendicular magnetic recording medium and method for producing the same'19915,059,337'Soft magnetic materials comprising 9 to 15 atomic percent carbon atoms'19915,000,984'Method of making a magnetic recording medium'19914,983,455'Magnetic recording medium and process for producing the same'19914,933,797'Arrangement for preventing entrance of harmful particles for use in a cartridge'19904,855,175'Magnetic recording medium and production thereof'19894,847,109'Method of a making magnetic recording medium'19894,826,739'Magnetic recording medium'19894,755,426'Magnetic recording medium and production of the same'19884,737,415'Magnetic recording medium and production thereof'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–2002Patents assigned to HITACHI MAXELL (15)· patent assignee history
1988–2002Based in Ibaraki, JP· patent location history
1991Based in Kitasoma-gun, JP· patent location history
1996Patents assigned to HITACHI LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI MAXELL | 15 | 1988–2002 |
| HITACHI LTD | 1 | 1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ibaraki, JP | 14 | 1988–2002 |
| Kitasoma-gun, JP | 1 | 1991 |