Inventor
Tsunekiyo Iwakawa
Inventor
Tokyo, JP
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G09Gprimary
G09GArrangements or circuits for control of indicating devices using static means to present variable information63%
H01JElectric discharge tubes or discharge lamps13%
H03KPulse technique13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
PatentTitleYear
4,859,910'Plasma display apparatus'19894,716,341'Display device'19874,027,195'Voltage switching device comprising a gas discharge panel'19773,987,337'Plasma display panel having additional discharge cells of a larger effective area and driving circuit therefor'19763,953,762'Circuit for supplying a specified one of plural external electrodes of a gas discharge display panel with unidirectional firing voltage pulses and for supplying others with pulses of a reduced voltage'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1977Patents assigned to NIPPON ELECTRIC CO (3)· patent assignee history
1976–1989Based in Tokyo, JP· patent location history
1987–1989Patents assigned to NEC CORP (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON ELECTRIC CO | 3 | 1976–1977 |
| NEC CORP | 2 | 1987–1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 5 | 1976–1989 |