Assignee
DUREL CORP
US48 patents
Top patents by PatentIndex Score
US5493183AFeb 20, 1996
Open loop brightness control for EL lamp
DUREL CORP245 citations97
US6043610AMar 28, 2000
Battery operated power supply including a low level boost and a high level boost
DUREL CORP89 citations96
US6703781B2Mar 9, 2004
El lamp with light scattering particles in cascading layer
DUREL CORP56 citations94
US5811930ASep 22, 1998
Electroluminescent lamp devices and their manufacture
DUREL CORP70 citations94
US5565733AOct 15, 1996
Electroluminescent modular lamp unit
DUREL CORP72 citations94
US5313141AMay 17, 1994
Three terminal inverter for electroluminescent lamps
DUREL CORP66 citations94
US6465951B1Oct 15, 2002
Electroluminescent lamp devices and their manufacture
DUREL CORP47 citations91
US6320323B1Nov 20, 2001
EL driver with lamp discharge monitor
DUREL CORP34 citations91
US6091164AJul 18, 2000
Single inverter with dual boost
DUREL CORP20 citations91
US6069444AMay 30, 2000
Electroluminescent lamp devices and their manufacture
DUREL CORP47 citations91
US5830028ANov 3, 1998
Roll coated EL panel
DUREL CORP46 citations91
US5502357AMar 26, 1996
Low cost inverter for EL lamp
DUREL CORP40 citations91
US5349269ASep 20, 1994
Power supply having dual inverters for electroluminescent lamps
DUREL CORP45 citations91
US5347198ASep 13, 1994
Low cost AC switch for electroluminescent lamps
DUREL CORP26 citations91
US6462485B1Oct 8, 2002
EL driver for small semiconductor die
DUREL CORP27 citations90
US5508585AApr 16, 1996
Electroluminescent lamp with controlled field intensity for displaying graphics
DUREL CORP35 citations90
US6411726B1Jun 25, 2002
Fingerprint detector using an EL lamp
DUREL CORP29 citations89
US5332946AJul 26, 1994
Electroluminescent lamp with novel edge isolation
DUREL CORP41 citations89
US5276382AJan 4, 1994
Lead attachment for electroluminescent lamp
DUREL CORP48 citations89
US6445128B1Sep 3, 2002
EL panel made with low molecular weight PVDF/HFP resin
DUREL CORP26 citations88
US5821691AOct 13, 1998
EL panel with continuous contacts on back of panel
DUREL CORP31 citations86
US5711594AJan 27, 1998
Tubular EL lamp
DUREL CORP34 citations86
US6611109B2Aug 26, 2003
Infrared emitting EL lamp
DUREL CORP13 citations83
US5770920AJun 23, 1998
Electroluminescent lamp having a terpolymer binder
DUREL CORP39 citations83
US5697322ADec 16, 1997
Analog display having electroluminescent pointer
DUREL CORP28 citations83
US5889364AMar 30, 1999
Electrical, solderless snap connector for EL lamp
DUREL CORP17 citations81
US5789870AAug 4, 1998
Low noise inverter for EL lamp
DUREL CORP36 citations81
US6297597B1Oct 2, 2001
EL driver with low side current mirrors
DUREL CORP8 citations72
US6259619B1Jul 10, 2001
EL driver with reduced pin count
DUREL CORP6 citations72
US6204609B1Mar 20, 2001
Enhanced inverter for powering an EL lamp
DUREL CORP11 citations72
US5483503AJan 9, 1996
Split chip inverter for EL lamp
DUREL CORP17 citations72
US6806642B2Oct 19, 2004
Light source with cascading dyes and BEF
DUREL CORP8 citations71
US6597123B1Jul 22, 2003
Inverter for driving EL lamp and liquid crystal display
DUREL CORP9 citations71
US6580222B2Jun 17, 2003
Inverter for driving EL lamp and light emitting diodes
DUREL CORP7 citations71
US6111362AAug 29, 2000
Controlling color shift in EL phosphors
DUREL CORP13 citations70
US6787993B2Sep 7, 2004
Ink including low molecular weight PVDF/HFP resin
DUREL CORP9 citations69
US6433476B1Aug 13, 2002
EL lamp with heater electrode
DUREL CORP8 citations69
US5806954ASep 15, 1998
Moving pointer with edgewise EL lamp
DUREL CORP12 citations69
US5598382AJan 28, 1997
Dual plane EL panel
DUREL CORP10 citations69
US6528943B2Mar 4, 2003
EL lamp with increased phosphor density
DUREL CORP10 citations68
US5806389ASep 15, 1998
EL lamp with beveled edge
DUREL CORP5 citations66
US5621274AApr 15, 1997
Laminated EL display
DUREL CORP12 citations66
US6818326B2Nov 16, 2004
EL lamp with flexible areas
DUREL CORP4 citations61
US6181589B1Jan 30, 2001
Half-bridge inverter for coupling an EL lamp to a high voltage DC rail
DUREL CORP4 citations61
US6407507B1Jun 18, 2002
Personal electronic device having EL lamp and buzzer powered from a single inductor
DUREL CORP5 citations60
US6343027B1Jan 29, 2002
Transformerless high voltage inverter using a fourth-order impedance network
DUREL CORP4 citations60
US6787988B2Sep 7, 2004
Process for treating previously coated phosphor particles
DUREL CORP0 citations51
US5828171AOct 27, 1998
EL lamp with beveled edge
DUREL CORP0 citations45