Masahiro Hiraga
19Patents
7h-index
36Co-inventors
66Inventor score
Filing activity: Apr 24, 1998 → Oct 29, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6286008A | Electronic information distribution method and recording medium | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6704212B2 | PWM inverter with long carrier wave insertion | Electricity | 26 | Expired |
| US8159820B2 | Electric power conversion system | Electricity | 24 | Active |
| US6496397B2 | Inverter device | Electricity | 17 | Expired |
| US6556464B2 | PWM converter system | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5949663A | Inverter apparatus capable of readily modification of the specification and performance thereof | Electricity | 14 | Expired |
| US6486548B1 | Semiconductor module and power converting apparatus using the module | Electricity | 13 | Expired |
| US7904254B2 | Power conversion apparatus and method of estimating power cycle life | Electricity | 7 | Active |
| US7515422B2 | Electric power converter | Electricity | 6 | Active |
| US6693404B2 | AC current detecting device for inverter apparatus and AC current detecting method therefor | Electricity | 6 | Expired |
| US8120294B2 | Power transducer | Electricity | 5 | Active |
| US7394668B2 | Switching power supply circuit and frequency converter | Electricity | 5 | Active |
| US7643304B2 | Filter apparatus and frequency converter to which the filter apparatus is connected | Electricity | 3 | Active |
| US8531140B2 | Power transducer | Electricity | 1 | Active |
| US8423317B2 | Temperature detection method of semiconductor device and power conversion apparatus | Electricity | 1 | Expired |
| US7151680B2 | Switching power supply circuit and frequency converter | Electricity | 1 | Expired |
| US12294328B2 | Power conversion device | Electricity | 0 | Active |
| US8378599B2 | Power transducer | Electricity | 0 | Active |
| US11870384B2 | Speed calculation device and power conversion device | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.