Inventor
Masahiro Hiraga
Inventor
Yotsukaido, JP
Overview
Patents· 17 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 systems48%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters13%
H05KPrinted circuits13%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1010%
G01KMeasuring temperature3%
G01RMeasuring electric variables3%
G06FElectric digital data processing3%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications3%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
PatentTitleYear
8,531,140'Power transducer'20138,423,317'Temperature detection method of semiconductor device and power conversion apparatus'20138,378,599'Power transducer'20138,159,820'Electric power conversion system'20128,120,294'Power transducer'20127,904,254'Power conversion apparatus and method of estimating power cycle life'20117,643,304'Filter apparatus and frequency converter to which the filter apparatus is connected'20107,515,422'Electric power converter'20097,394,668'Switching power supply circuit and frequency converter'20087,151,680'Switching power supply circuit and frequency converter'20066,704,212'PWM inverter with long carrier wave insertion'20046,693,404'AC current detecting device for inverter apparatus and AC current detecting method therefor'20046,556,464'PWM converter system'20036,496,397'Inverter device'20026,486,548'Semiconductor module and power converting apparatus using the module'20026,286,008'Electronic information distribution method and recording medium'20015,949,663'Inverter apparatus capable of readily modification of the specification and performance thereof'1999Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1999–2004Patents assigned to HITACHI LTD (6)· patent assignee history
1999Based in Yachiyo, JP· patent location history
2001Based in Tokyo, JP· patent location history
2002–2013Based in Yotsukaido, JP· patent location history
2004Based in Ome, JP· patent location history
2006–2013Patents assigned to HITACHI IND EQUIPMENT SYS (9)· patent assignee history
2009–2013Based in Yotsukaidou, JP· patent location history
2012–2013Patents assigned to HIRAGA MASAHIRO (5)· patent assignee history
2012–2013Patents assigned to IBORI SATOSHI (5)· patent assignee history
2012–2013Patents assigned to UCHINO YOSHIHIRO (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI IND EQUIPMENT SYS | 9 | 2006–2013 |
| HITACHI LTD | 6 | 1999–2004 |
| HIRAGA MASAHIROself | 5 | 2012–2013 |
| IBORI SATOSHI | 5 | 2012–2013 |
| UCHINO YOSHIHIRO | 3 | 2012–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yotsukaido, JP | 10 | 2002–2013 |
| Yotsukaidou, JP | 4 | 2009–2013 |
| Ome, JP | 1 | 2004 |
| Tokyo, JP | 1 | 2001 |
| Yachiyo, JP | 1 | 1999 |