Koji Iwahashi
10Patents
4h-index
15Co-inventors
57Inventor score
Filing activity: Jul 1, 1975 → Jun 27, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4052172A | Process for gasifying coal or other carbon containing material | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4742565A | Radio receiver with field intensity detector | Electricity | 19 | Expired |
| US5033293A | Alcohol concentration detecting device | Physics | 19 | Expired |
| US4983904A | Battery charger for vehicle-mounted equipment using engine operation as start timing determination | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4484358A | Receiver having switched capacitor filter | Electricity | 4 | Expired |
| US10135379B2 | State display device of industrial machinery and power conversion device | Physics | 3 | Active |
| US5603105A | Baseband signal processing circuit for a radio communication apparatus | Electricity | 3 | Expired |
| US5201070A | Radio communication apparatus comprising a single level controller | Electricity | 2 | Expired |
| US8918668B2 | Interface circuit, inverter device, inverter system, and transmitting and receiving method | Electricity | 1 | Active |
| US9660545B2 | Matrix converter | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.