Jun Kumagai
19Patents
6h-index
28Co-inventors
66Inventor score
Filing activity: May 29, 1997 → Mar 20, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7141937B2 | High-pressure discharge lamp operation device and illumination appliance having the same | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5942859A | Discharge lamp lighting device | Electricity | 11 | Expired |
| US7425802B2 | Discharge lamp lighting apparatus, luminaire and illumination system | Emerging Cross-Sectional Technologies | 11 | Expired |
| US8232746B2 | High pressure discharge lamp lighting device and lighting fixture using the same | Emerging Cross-Sectional Technologies | 7 | Active |
| US8115405B2 | High pressure discharge lamp lighting device and luminaire using same | Emerging Cross-Sectional Technologies | 7 | Active |
| US8294385B2 | High-pressure discharge lamp ballast with multi-mode lamp starting circuit | Emerging Cross-Sectional Technologies | 6 | Active |
| US8395327B2 | High-pressure discharge lamp lighting device and lighting fixture using the same | Emerging Cross-Sectional Technologies | 4 | Active |
| US8502475B2 | Discharge lamp ballast with feedback current control during an electrode heating operation | Emerging Cross-Sectional Technologies | 4 | Active |
| US8044601B2 | High voltage discharge lamp lighting device | Emerging Cross-Sectional Technologies | 3 | Active |
| US8222830B2 | Discharge lamp lighting device, lighting fixture, and lighting system | Electricity | 3 | Active |
| US8344095B2 | Fused ring compound, method for producing the same, polymer, organic thin film containing the compound and/or polymer, and organic thin film device and organic thin film transistor each comprising the organic thin film | Electricity | 2 | Active |
| US8531124B2 | High pressure discharge lamp lighting device and illumination instrument | Emerging Cross-Sectional Technologies | 1 | Active |
| US8299723B2 | Electronic ballast with lamp flicker suppression during start-to-steady state transition | Electricity | 0 | Active |
| US9169539B2 | Cu-Mg-P-based copper alloy sheet having excellent fatigue resistance characteristic and method of producing the same | Chemistry; Metallurgy | 0 | Active |
| US8228006B2 | High pressure discharge lamp lighting device and lighting fixture using the same | Emerging Cross-Sectional Technologies | 0 | Active |
| US11848142B2 | Multilayer coil component and method for manufacturing same, as well as circuit board carrying multilayer coil component | Electricity | 0 | Active |
| US10253405B2 | Cu—Ni—Si-based copper alloy sheet having excellent mold abrasion resistance and shear workability and method for manufacturing same | Electricity | 0 | Active |
| US8593077B2 | High-voltage discharge lamp lighting device and lighting fixture | Emerging Cross-Sectional Technologies | 0 | Active |
| US8638039B2 | Electronic ballast and method for providing a DC voltage component during lamp startup | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.