Jun Nagai
56Patents
10h-index
47Co-inventors
78Inventor score
Filing activity: Nov 21, 1980 → Feb 27, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5159365A | Camera with device for identifying used film magazine | Physics | 61 | Expired |
| US6380836B2 | Coil device and switching power supply apparatus using the same | Emerging Cross-Sectional Technologies | 57 | Expired |
| US6281779A | Coil device and switching power supply apparatus using the same | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6295214A | Switching power supply unit | Electricity | 17 | Expired |
| US6185114A | Isolating DC-DC converter | Emerging Cross-Sectional Technologies | 17 | Expired |
| US7027086B1 | Photographing apparatus and signal processing method that allow data of still pictures to be converted into a moving picture file | Electricity | 14 | Expired |
| US5861915A | Temperature-dependant, frequency-compensated hand deviation correction device for video camera | Electricity | 14 | Expired |
| US6876555B2 | Surface-mount type switching power-supply unit and mounting method for the same | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6414861B1 | DC-DC converter | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6778412B2 | Synchronous converter with reverse current protection through variable inductance | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6757174B2 | Switching power-supply module | Electricity | 10 | Expired |
| US6181579A | DC-DC converter | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6961460B2 | Dual mode digital picture signal processing | Electricity | 8 | Expired |
| US5367353A | Operation control device for a camera | Physics | 8 | Expired |
| US6574081B1 | DC-DC converter | Electricity | 7 | Expired |
| US5721981A | Operation control device for a camera | Physics | 6 | Expired |
| US6513230B2 | Coil apparatus and manufacturing method for the same | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4430116A | Method and apparatus for heating or heating and reduction raw materials for a metallurgical furnace utilizing waste gases from the same furnace | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7042739B2 | Switching electric source device | Emerging Cross-Sectional Technologies | 6 | Expired |
| US8186594B2 | Image processing method and apparatus thereof | Electricity | 5 | Active |
| US5649252A | Camera with device for identifying used film magazine | Physics | 4 | Expired |
| US5768634A | Hand deviation correction apparatus | Electricity | 4 | Expired |
| US8243335B2 | Device for changing screen ruling for image formation in accordance with relationship between luminance and saturation | Electricity | 4 | Active |
| US7158394B2 | Switching power supply circuit with a soft-start function | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6690256B2 | Coil device | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.