Durel Corporation
49Patents
0Active
49Granted
37Portfolio score
Filing activity: Aug 20, 1991 → Jan 13, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5493183A | Open loop brightness control for EL lamp | Emerging Cross-Sectional Technologies | 171 | Expired |
| US6043610A | Battery operated power supply including a low level boost and a high level boost | Emerging Cross-Sectional Technologies | 96 | Expired |
| US5313141A | Three terminal inverter for electroluminescent lamps | Emerging Cross-Sectional Technologies | 49 | Expired |
| US6703781B2 | El lamp with light scattering particles in cascading layer | Electricity | 42 | Expired |
| US5565733A | Electroluminescent modular lamp unit | Electricity | 39 | Expired |
| US5276382A | Lead attachment for electroluminescent lamp | Electricity | 38 | Expired |
| US5811930A | Electroluminescent lamp devices and their manufacture | Electricity | 33 | Expired |
| US5508585A | Electroluminescent lamp with controlled field intensity for displaying graphics | Electricity | 29 | Expired |
| US5830028A | Roll coated EL panel | Electricity | 28 | Expired |
| US5332946A | Electroluminescent lamp with novel edge isolation | Electricity | 24 | Expired |
| US5349269A | Power supply having dual inverters for electroluminescent lamps | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5789870A | Low noise inverter for EL lamp | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5770920A | Electroluminescent lamp having a terpolymer binder | Electricity | 24 | Expired |
| US5711594A | Tubular EL lamp | Physics | 22 | Expired |
| US5502357A | Low cost inverter for EL lamp | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6320323A | EL driver with lamp discharge monitor | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5821691A | EL panel with continuous contacts on back of panel | Electricity | 18 | Expired |
| US6069444A | Electroluminescent lamp devices and their manufacture | Electricity | 17 | Expired |
| US6411726B1 | Fingerprint detector using an EL lamp | Physics | 17 | Expired |
| US6465951B1 | Electroluminescent lamp devices and their manufacture | Electricity | 17 | Expired |
| US6462485B1 | EL driver for small semiconductor die | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5347198A | Low cost AC switch for electroluminescent lamps | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5808412A | EL panel laminated to rear electrode | Electricity | 15 | Expired |
| US5697322A | Analog display having electroluminescent pointer | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6445128B1 | EL panel made with low molecular weight PVDF/HFP resin | Electricity | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.