Citizen Electronics Co., Ltd.
618Patents
385Active
618Granted
56Portfolio score
Filing activity: Dec 21, 1993 → Dec 12, 2023 · 137 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6345903B1 | Surface-mount type emitting diode and method of manufacturing same | Emerging Cross-Sectional Technologies | 186 | Expired |
| US6731355B2 | Lighting panel for a display | Physics | 167 | Expired |
| US5959846A | Modular surface mount circuit device and a manufacturing method thereof | Electricity | 156 | Expired |
| US6914267B2 | Light emitting diode | Electricity | 137 | Expired |
| US6069676A | Sequential color display device | Physics | 105 | Expired |
| US7690813B2 | LED illumination lamp device | Mechanical Engineering; Lighting; Heating | 97 | Active |
| US6396082B1 | Light-emitting diode | Electricity | 92 | Expired |
| US7066626B2 | LED lamp | Electricity | 84 | Expired |
| US6768536B2 | Liquid crystal microlens | Physics | 84 | Expired |
| US6876149B2 | Double-face LED device for an electronic instrument | Electricity | 81 | Expired |
| US7230196B2 | Lighted switch device | Electricity | 79 | Expired |
| US7365485B2 | White light emitting diode with first and second LED elements | Electricity | 78 | Expired |
| USD615052S1 | Light-emitting diode | General | 74 | Expired |
| US7061454B2 | Light emitting diode device | Electricity | 74 | Expired |
| USD618635S1 | Light-emitting diode for illuminating an object | General | 71 | Expired |
| US6744194B2 | Light emitting diode | Electricity | 65 | Expired |
| US6193383A | Linear light source unit | Physics | 61 | Expired |
| US7218041B2 | Light emitting device provided with electrically conductive members having high thermal conductivity for thermal radiation | Electricity | 60 | Expired |
| USD592615S1 | Light-emitting diode for illuminating an object | General | 60 | Expired |
| USD669041S1 | Light-emitting diode | General | 59 | Active |
| US6139163A | Planar light source unit | Physics | 58 | Expired |
| USD607420S1 | Light-emitting diode for illuminating an object | General | 58 | Expired |
| US7188989B2 | Light guide plate and support unit for the same | Physics | 56 | Expired |
| US7932890B2 | Lightguide plate and electronic device | Physics | 56 | Active |
| USD591248S1 | Light-emitting diode for illuminating an object | General | 55 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.