Inventor · disambiguated record
Kenneth Li
Also filed as: LI KENNETH · LI KENNETH K
68 granted patents·44 pending applications·1,883 citations·filing 1993–2022
99Inventor score
Top patents by PatentIndex Score
112 records- 0198US6587269B2Polarization recovery system for projection displaysCOGENT LIGHT TECH·Filed 2001·Granted Jul 1, 2003·95 cites·20 claims
- 0297US6227682B1Coupling of light from a small light source for projection systems using parabolic reflectorsCOGENT LIGHT TECH·Filed 2000·Granted May 8, 2001·100 cites·23 claims
- 0395US6634759B1Coupling of light from a light source to a target using dual ellipsoidal reflectorsCOGENT LIGHT TECH·Filed 2000·Granted Oct 21, 2003·63 cites·40 claims
- 0494US6385371B1Optical system including coupling for transmitting light between a single fiber light guide and multiple single fiber light guidesCOGENT LIGHT TECH·Filed 2000·Granted May 7, 2002·77 cites·37 claims
- 0594US6157323AButton-key/cylindrical-key alphabetizerFiled 1999·Granted Dec 5, 2000·196 cites·18 claims
- 0692US7002745B2Polarization recovery system for projection displaysWAVIEN INC·Filed 2005·Granted Feb 21, 2006·10 cites·21 claims
- 0792US5430620ACompact surgical illumination system capable of dynamically adjusting the resulting field of illuminationCOGENT LIGHT TECH·Filed 1993·Granted Jul 4, 1995·95 cites·25 claims
- 0891US8388190B2Illumination system and method for recycling light to increase the brightness of the light sourceLI KENNETH·Filed 2011·Granted Mar 5, 2013·43 cites·10 claims
- 0991US7976204B2Illumination system and method for recycling light to increase the brightness of the light sourceWAVIEN INC·Filed 2007·Granted Jul 12, 2011·45 cites·35 claims
- 1091US6926435B2Led illumination engine using a reflectorWAVIEN INC·Filed 2002·Granted Aug 9, 2005·48 cites·140 claims
- 1190US7020368B2Lensed tapered optical waveguideWAVIEN INC·Filed 2005·Granted Mar 28, 2006·16 cites·59 claims
- 1290US6856727B2Coupling of light from a non-circular light sourceWAVIEN INC·Filed 2002·Granted Feb 15, 2005·46 cites·37 claims
- 1388US7452086B2Light pipe based projection engineWAVIEN INC·Filed 2007·Granted Nov 18, 2008·10 cites·4 claims
- 1488US6129662ASurgical tool with surgical field illuminatorCOGENT LIGHT TECH·Filed 1996·Granted Oct 10, 2000·92 cites·40 claims
- 1588US5635926APointing and/or directional control device for controlling the movement and positioning of an objectFiled 1994·Granted Jun 3, 1997·48 cites·16 claims
- 1687US6829412B2Lensed tapered optical waveguideWAVIEN INC·Filed 2002·Granted Dec 7, 2004·47 cites·11 claims
- 1787US6231199B1Collecting and condensing optical system using cascaded parabolic reflectorsCOGENT LIGHT TECH·Filed 2000·Granted May 15, 2001·37 cites·31 claims
- 1886US6969177B2Polarization recovery system using redirectionWAVIEN INC·Filed 2004·Granted Nov 29, 2005·31 cites·21 claims
- 1986US6312144B1Optical system having retro-reflectorsCOGENT LIGHT TECH·Filed 2000·Granted Nov 6, 2001·34 cites·18 claims
- 2085US8317331B2Recycling system and method for increasing brightness using light pipes with one or more light sources, and a projector incorporating the sameLI KENNETH·Filed 2009·Granted Nov 27, 2012·14 cites·23 claims
- 2185US7172290B2Light pipe based projection engineWAVIEN INC·Filed 2004·Granted Feb 6, 2007·23 cites·48 claims
- 2285US7130122B2Polarization recovery system for projection displaysWAVIEN INC·Filed 2005·Granted Oct 31, 2006·4 cites·21 claims
- 2385US6739726B2Illumination engine for a projection display using a tapered light pipeWAVIEN INC·Filed 2002·Granted May 25, 2004·29 cites·59 claims
- 2484US7513630B2Compact dual ellipsoidal reflector (DER) system having two molded ellipsoidal modules such that a radiation receiving module reflects a portion of rays to an opening in the other moduleWAVIEN INC·Filed 2006·Granted Apr 7, 2009·12 cites·27 claims
- 2584US6619820B2Light condensing and collecting systems using lensed light pipesCOGENT LIGHT TECH·Filed 2001·Granted Sep 16, 2003·28 cites·30 claims
- 2683US9767719B2Billboard or other large displays having artwork illuminated with an LED backlight arrayWAVIEN INC·Filed 2015·Granted Sep 19, 2017·4 cites·11 claims
- 2783US7710669B2Etendue efficient combination of multiple light sourcesWAVIEN INC·Filed 2006·Granted May 4, 2010·10 cites·18 claims
- 2883US6840623B2Light recovery for projection displaysWAVIEN INC·Filed 2002·Granted Jan 11, 2005·21 cites·37 claims
- 2983US6672740B1Condensing and collecting optical system using parabolic reflectors or a corresponding ellipsoid/hyperboloid pair of reflectorsCOGENT LIGHT TECH·Filed 2000·Granted Jan 6, 2004·27 cites·48 claims
- 3083US5751869AOptical system for coupling light from a single fiber optic into a fiber bundleCOGENT LIGHT TECH·Filed 1996·Granted May 12, 1998·65 cites·23 claims
- 3182US7618158B2Illumination system using filament lampsWAVIEN INC·Filed 2006·Granted Nov 17, 2009·8 cites·11 claims
- 3281US7357550B2LED illumination engine using a reflectorWAVIEN INC·Filed 2005·Granted Apr 15, 2008·7 cites·10 claims
- 3381US6626582B2Snap-on connector system for coupling light from an illuminator to a fiber opticCOGENT LIGHT TECH·Filed 2001·Granted Sep 30, 2003·36 cites·2 claims
- 3480US8858037B2Light emitting diode array illumination system with recyclingLI KENNETH·Filed 2012·Granted Oct 14, 2014·6 cites·21 claims
- 3580US8789973B2Liquid cooled LED lighting deviceLI KENNETH·Filed 2011·Granted Jul 29, 2014·6 cites·44 claims
- 3680US6616304B2Temperature control for arc lampsCOGENT LIGHT TECH·Filed 2001·Granted Sep 9, 2003·30 cites·52 claims
- 3780US6565235B2Folding an arc into itself to increase the brightness of an arc lampCOGENT LIGHT TECH·Filed 2001·Granted May 20, 2003·25 cites·78 claims
- 3880US5709459ASurgical luminaireCOGENT LIGHT TECH·Filed 1994·Granted Jan 20, 1998·54 cites·18 claims
- 3979US7339735B2Polarization recovery system for projection displaysWAVIEN INC·Filed 2006·Granted Mar 4, 2008·4 cites·5 claims
- 4079US6595673B1Coupling of high intensity light into low melting point fiber optics using polygonal homogenizersCOGENT LIGHT TECH·Filed 1999·Granted Jul 22, 2003·48 cites·39 claims
- 4178US7151874B2Lensed tapered optical waveguideWAVIEN INC·Filed 2006·Granted Dec 19, 2006·11 cites·32 claims
- 4278US5707131ACollections and condensing optical system using cascaded concave reflectorsCOGENT LIGHT TECH·Filed 1996·Granted Jan 13, 1998·49 cites·15 claims
- 4378US5642456ALight intensity attenuator for optical transmission systemsCOGENT LIGHT TECH·Filed 1993·Granted Jun 24, 1997·51 cites·20 claims
- 4475US7232228B2Light recovery for projection displaysWAVIEN INC·Filed 2004·Granted Jun 19, 2007·13 cites·30 claims
- 4575US7006288B2Polarization recovery system for projection displaysWAVIEN INC·Filed 2004·Granted Feb 28, 2006·7 cites·3 claims
- 4675US6898353B2Lensed tapered optical waveguideWAVIEN INC·Filed 2004·Granted May 24, 2005·10 cites·42 claims
- 4774US7338187B2Multiple lamp illumination systemWAVIEN INC·Filed 2003·Granted Mar 4, 2008·12 cites·41 claims
- 4873US7631989B2Dual paraboloid reflector and dual ellipsoid reflector systems with optimized magnificationWAVIEN INC·Filed 2006·Granted Dec 15, 2009·6 cites·36 claims
- 4973US7092159B2Polarization recovery system for projection displaysWAVIEN INC·Filed 2004·Granted Aug 15, 2006·5 cites·17 claims
- 5071US9057488B2Liquid-cooled LED lampWAVIEN INC·Filed 2013·Granted Jun 16, 2015·1 cites·20 claims
Showing the top 50 of 112 patent records by PatentIndex Score.
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