Inventor
Hiroyuki Sogawa
Inventor
Kanagawa, JP
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers50%
H04SStereophonic systems21%
G10KSound-producing devices14%
A61FFilters implantable into blood vessels7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
5,495,534'Audio signal reproducing apparatus'19965,452,359'Acoustic signal reproducing apparatus'19955,276,740'Earphone device'19945,228,089'Hearing aid'19935,181,248'Acoustic signal reproducing apparatus'19935,062,140'Induction speaker'19915,022,486'Sound reproducing apparatus'19914,726,443'Diaphragm'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–1996Patents assigned to SONY CORP (8)· patent assignee history
1988Patents assigned to FUJIKURA LTD (1)· patent assignee history
1988–1995Based in Kanagawa, JP· patent location history
1996Based in Kitashinagawa, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SONY CORP | 8 | 1988–1996 |
| FUJIKURA LTD | 1 | 1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 7 | 1988–1995 |
| Kitashinagawa, JP | 1 | 1996 |