DOWA Electronics Materials Co., Ltd.
314Patents
290Active
314Granted
58Portfolio score
Filing activity: Apr 22, 2002 → Aug 16, 2023 · 105 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7476337B2 | Phosphor and manufacturing method for the same, and light source | Chemistry; Metallurgy | 29 | Expired |
| US7432647B2 | Light source having phosphor including divalent trivalent and tetravalent elements | Emerging Cross-Sectional Technologies | 29 | Expired |
| USD778849S1 | Light emitting diode chip | General | 28 | Active |
| US7476338B2 | Phosphor and manufacturing method for the same, and light source | Emerging Cross-Sectional Technologies | 22 | Expired |
| US7887718B2 | Phosphor and manufacturing method therefore, and light emission device using the phosphor | Emerging Cross-Sectional Technologies | 17 | Active |
| US7524437B2 | Phosphor and manufacturing method of the same, and light emitting device using the phosphor | Electricity | 15 | Active |
| US7443094B2 | Phosphor and manufacturing method of the same, and light emitting device using the phosphor | Chemistry; Metallurgy | 14 | Active |
| US8227789B2 | Optical semiconductor device and method of manufacturing the same | Electricity | 13 | Active |
| US7514860B2 | Phosphor mixture and light emitting device | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7445730B2 | Phosphor and manufacturing method of the same, and light emitting device using the phosphor | Electricity | 11 | Active |
| US8444872B2 | Magnetic iron oxide particle, magnetic material, and radio wave absorber | Chemistry; Metallurgy | 11 | Active |
| US8344356B2 | Semiconductor material, method of making the same, and semiconductor device | Electricity | 10 | Active |
| US10622127B2 | Iron-based oxide magnetic particle powder, method for producing same, coating material, and magnetic recording medium | Physics | 9 | Active |
| US9006865B2 | Epitaxial growth substrate, semiconductor device, and epitaxial growth method | Electricity | 9 | Active |
| US7781082B2 | Magnetic material | Emerging Cross-Sectional Technologies | 9 | Active |
| US10099941B2 | Magnetic iron oxide nanopowder and process for producing the same | Chemistry; Metallurgy | 8 | Active |
| US8426893B2 | Epitaxial substrate for electronic device and method of producing the same | Electricity | 8 | Active |
| US7477009B2 | Phosphor mixture and light emitting device | Electricity | 8 | Active |
| US8742396B2 | III nitride epitaxial substrate and deep ultraviolet light emitting device using the same | Electricity | 8 | Active |
| US7812516B2 | Light-emitting device and manufacturing method thereof | Electricity | 7 | Active |
| US7291289B2 | Phosphor and production method of the same and light source and LED using the phosphor | Electricity | 7 | Expired |
| US10919778B2 | Method for producing iron-based oxide magnetic particle powder | Chemistry; Metallurgy | 7 | Active |
| US7618475B2 | Metal powder for electrically conductive paste and electrically conductive paste | Electricity | 6 | Active |
| USD703863S1 | Lighting elements | General | 6 | Active |
| US7923408B2 | Diesel particulate filter and exhaust emission control system | Emerging Cross-Sectional Technologies | 6 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.