Inventor
Mitsuyuki Honbu
Inventor
Katsuta, JP
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Mprimary
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 systems45%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters27%
B60GVehicle suspension arrangements9%
B66BElevators9%
H02HEmergency protective circuit arrangements9%
PatentTitleYear
5,184,057'Control method and device for AC motor'19934,865,148'Vehicle height control apparatus responsive to power steering operation'19894,779,709'Apparatus for controlling AC elevators'19884,549,258'Inverter device using gate turn-off thyristors'19854,420,718'Control system for induction motor using inverter for AC power supply'19834,276,589'Twelve-step current source inverter'19814,188,663'Protective device of a current source inverter'19804,058,755'Kramer system utilizing a commutatorless motor'19773,949,283'Control system for brushless motor'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1993Patents assigned to HITACHI LTD (9)· patent assignee history
1976–1981Based in Hitachi, JP· patent location history
1983–1993Based in Katsuta, JP· patent location history
1985Patents assigned to HITACHI ENG CO LTD (1)· patent assignee history
1989Patents assigned to HITACHI AUTOMOTIVE ENGINEER CO (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 9 | 1976–1993 |
| HITACHI AUTOMOTIVE ENGINEER CO | 1 | 1989 |
| HITACHI ENG CO LTD | 1 | 1985 |
Locations
| Location | Patents | Span |
|---|---|---|
| Katsuta, JP | 5 | 1983–1993 |
| Hitachi, JP | 4 | 1976–1981 |