PHOENIX ELECTRIC CO., LTD.
51Patents
34Active
51Granted
48Portfolio score
Filing activity: Dec 19, 1983 → Dec 20, 2022 · 9 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8029167B2 | Light emitting device | Electricity | 21 | Active |
| US6509674B1 | Discharge lamp with ventilation passage | Electricity | 21 | Expired |
| US4538133A | Passively detonated explosively-assisted fuse | Electricity | 15 | Expired |
| US6600266B1 | Mount for lamp and lamp seal structure employing the mount | Electricity | 13 | Expired |
| US8864343B2 | Light emitting device | Electricity | 10 | Active |
| US4604613A | Status-indicating current interrupter | Electricity | 9 | Expired |
| US6788009B2 | Method and device for lighting ultra-high pressure discharge lamps | Electricity | 9 | Expired |
| US7306340B2 | Projection system using a high-pressure discharge lamp adapted to d.c. lighting, and method of operating the same | Electricity | 7 | Expired |
| US6713972B2 | ULTRA-HIGH PRESSURE DISCHARGE LAMP LIGHTING METHOD, ULTRA-HIGH PRESSURE DISCHARGE LAMP TO WHICH THE METHOD IS APPLICABLE AND BALLAST FOR USE THEREIN, AND LIGHTING SYSTEM INCORPORATING THE LAMP AND THE BALLAST | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7517093B2 | Projection-type system and method of operating the same | Physics | 5 | Expired |
| US8067881B2 | Light emitting device | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US8197101B2 | Reflector for use in light emitting device and light emitting device using the same | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US6756744B2 | Method of initiating lighting of a discharge lamp, circuit for lighting a discharge lamp, light source device using the circuit, and optical instrument incorporating the light source device | Electricity | 3 | Expired |
| US6285130A | Metal halide lamp | Electricity | 3 | Expired |
| US7348737B2 | Lighting circuit for high-pressure discharge lamp | Emerging Cross-Sectional Technologies | 3 | Active |
| US7504780B2 | Power supply unit for light source and method of controlling the same | Electricity | 3 | Active |
| US6713963B2 | Ultra-high pressure discharge lamp | Electricity | 2 | Expired |
| US6914393B2 | Method and device for lighting high pressure discharge lamps | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6242861A | Direct current discharge lamp and light source having the discharge lamp attached to reflector | Electricity | 2 | Expired |
| US8272768B2 | Light emitting device | Mechanical Engineering; Lighting; Heating | 2 | Active |
| USD927046S1 | Reflector for lamp | General | 1 | Active |
| US9841165B1 | LED lamp | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US8040077B2 | Starting circuit of starting device for high-pressure discharge lamp including auxiliary light source, starting device including the starting circuit, and lighting system including the starting device | Electricity | 1 | Active |
| US6280061A | Halogen lamp with reflector | Electricity | 1 | Expired |
| US6335593B1 | Electric discharge lamp with an improved sealing structure improving uniformity of light output and method of making | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.