Inventor
Nobuya Sekiyama
Inventor
Yokohama, JP
Overview
Patents· 9 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 classification18%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests12%
B05BSpraying apparatus6%
B24BMachines, devices, or processes for grinding or polishing6%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form6%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof6%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges6%
PatentTitleYear
10,788,064Composite structure20209,464,612'Fuel injection valve'20165,825,591'Frictionally sliding head magnet disk apparatus'19985,680,285'Magnetic disk having improved surface configuration and magnetic disk unit including same'19975,549,211'Method of producing magnetic disk'19965,388,020'Magnetic disk having improved surface configuration and magnetic disk unit including same'19955,364,655'Simultaneous double sides polishing method'19945,353,182'Magnetic disk unit having magnetic disks and a magnetic head with a head slider which is in contact with surfaces of the magnetic disk'19945,202,810'Magnetic disk having an improved surface configuration'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1993–2020Patents assigned to HITACHI LTD (8)· patent assignee history
1993–2016Based in Yokohama, JP· patent location history
2016Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (1)· patent assignee history
2020Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 8 | 1993–2020 |
| HITACHI AUTOMOTIVE SYSTEMS LTD | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokohama, JP | 8 | 1993–2016 |
| Tokyo, JP | 1 | 2020 |