Inventor
Hiroshi Sugisaka
Inventor
Hitachi, JP
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters50%
H02HEmergency protective circuit arrangements13%
H02JElectric power networks13%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems13%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution13%
PatentTitleYear
4,812,729'Protecting apparatus for secondary excitation type variable speed AC generator/motor'19894,766,360'Induction generator/motor system'19884,743,826'Pumping-up generator/motor system and method of operation of the same'19884,742,288'Control system for AC motor/generator of secondary AC excitation type'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–1989Patents assigned to HITACHI LTD (4)· patent assignee history
1988Patents assigned to KANSAI ELECTRIC POWER CO (3)· patent assignee history
1988Based in Hitachi, JP· patent location history
1989Patents assigned to KANSAI ELECTRIC (1)· patent assignee history
1989Based in Takahagi, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 4 | 1988–1989 |
| KANSAI ELECTRIC POWER CO | 3 | 1988 |
| KANSAI ELECTRIC | 1 | 1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 3 | 1988 |
| Takahagi, JP | 1 | 1989 |