Inventor
Yoshiro Joichi
Inventor
Tokyo, 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 transducer56%
H03GControl of amplification22%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
6,081,493'Apparatus for demodulating digital FM signal in an optical disc device'20005,907,528'Apparatus for demodulating a digital FM signal which normally has signal inversions at data bit boundaries'19995,838,649'Apparatus for demodulating digital FM signal in an optical disc device'19984,922,513'Rotation control circuit for a hall motor'1990RE032278'Muting circuit'19864,476,555'Tracking servo apparatus for an optical information reproducing system'19844,420,694'Muting circuit'19834,379,286'Digital signal processing circuit'1983Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1983–2000Patents assigned to SONY CORP (7)· patent assignee history
1983–2000Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SONY CORP | 7 | 1983–2000 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 8 | 1983–2000 |