Inventor
Keiji Narusawa
Inventor
Kanagawa, JP
Overview
Patents· 7 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 transducer70%
H03FAmplifiers20%
G05FSystems for regulating electric or magnetic variables10%
PatentTitleYear
8,023,391'Photodetection device and optical disk device'20116,920,002'Reproducing amplifier and magnetic recording and reproducing apparatus employing the reproducing amplifier'20056,798,601'Impact detecting circuit, impact detecting apparatus, and recording and reproducing apparatus including same'20046,762,894'Head apparatus, hard disk apparatus and recording and playback apparatus'20046,683,740'Architecture for a hard disk drive write amplifier circuit with damping control'20046,154,333'Amplification circuit'20005,818,211'Current generating circuit for read/write head'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998–2011Patents assigned to SONY CORP (7)· patent assignee history
1998–2011Based in Kanagawa, JP· patent location history
2004Patents assigned to SONY ELECTRONICS INC (1)· patent assignee history
2004Based in Atsugi, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SONY CORP | 7 | 1998–2011 |
| SONY ELECTRONICS INC | 1 | 2004 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 6 | 1998–2011 |
| Atsugi, JP | 1 | 2004 |