Inventor · disambiguated record
David B. Knowles
Also filed as: KNOWLES DAVID · KNOWLES DAVID B
63 granted patents·5 pending applications·7,003 citations·filing 1988–2024
99Inventor score
Files withUNIVERSAL DISPLAY CORP21TRANSITIONS OPTICAL INC18CHOPRA ANU6KWONG RAYMOND4PPG INDUSTRIES INC4
Top patents by PatentIndex Score
68 records- 0199US5384077APhotochromic naphthopyran compoundsTRANSITIONS OPTICAL INC·Filed 1993·Granted Jan 24, 1995·269 cites·19 claims
- 0299US5238981APhotochromic naphthopyransTRANSITIONS OPTICAL INC·Filed 1992·Granted Aug 24, 1993·219 cites·22 claims
- 0398US9465234B2Photochromic materials having extended pi-conjugated systems and compositions and articles including the sameJOHNSON & JOHNSON VISION CARE·Filed 2015·Granted Oct 11, 2016·56 cites·26 claims
- 0498US7087321B2Organic light emitting devices having reduced pixel shrinkageUNIVERSAL DISPLAY CORP·Filed 2004·Granted Aug 8, 2006·901 cites·3 claims
- 0598US6835469B2Phosphorescent compounds and devices comprising the sameUNIV SOUTHERN CALIFORNIA·Filed 2001·Granted Dec 28, 2004·1.3k cites·2 claims
- 0698US6687266B1Organic light emitting materials and devicesUNIVERSAL DISPLAY CORP·Filed 2002·Granted Feb 3, 2004·1.3k cites·35 claims
- 0798US5658501ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1995·Granted Aug 19, 1997·345 cites·20 claims
- 0898US5451344APhotochromic naphthopyran compoundsTRANSITIONS OPTICAL INC·Filed 1994·Granted Sep 19, 1995·131 cites·22 claims
- 0998US5369158APhotochromic naphthopyransTRANSITIONS OPTICAL INC·Filed 1993·Granted Nov 29, 1994·102 cites·16 claims
- 1097US9548462B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2016·Granted Jan 17, 2017·13 cites·20 claims
- 1197US9097916B2Photochromic materials having extended pi-conjugated systems and compositions and articles including the sameJOHNSON & JOHNSON VISION CARE·Filed 2014·Granted Aug 4, 2015·56 cites·33 claims
- 1297US8741188B2Ophthalmic devices comprising photochromic materials having extended pi-conjugated systemsCHOPRA ANU·Filed 2012·Granted Jun 3, 2014·60 cites·12 claims
- 1397US6916554B2Organic light emitting materials and devicesUNIVERSAL DISPLAY CORP·Filed 2002·Granted Jul 12, 2005·152 cites·26 claims
- 1497US6348604B1Photochromic naphthopyransPPG IND OHIO INC·Filed 2000·Granted Feb 19, 2002·240 cites·23 claims
- 1597US6296785B1Indeno-fused photochromic naphthopyransPPG IND OHIO INC·Filed 2000·Granted Oct 2, 2001·349 cites·23 claims
- 1697US5464567APhotochromic tetraphenyl naphthodipyransTRANSITIONS OPTICAL INC·Filed 1994·Granted Nov 7, 1995·94 cites·12 claims
- 1797US5458815APhotochromic naphthopyran compoundsTRANSITIONS OPTICAL INC·Filed 1994·Granted Oct 17, 1995·92 cites·18 claims
- 1897US5458814ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1993·Granted Oct 17, 1995·230 cites·24 claims
- 1996US8691988B2Metal complexes of cyclometallated imidazo (1,2-f) phenanthridine (1,2-a:1′, 2′-c),quinazoline ligands and isoelectronic and benzannulated analogs thereofUNIVERSAL DISPLAY CORP·Filed 2013·Granted Apr 8, 2014·10 cites·20 claims
- 2096US8158037B2Photochromic materials having extended pi-conjugated systems and compositions and articles including the sameCHOPRA ANU·Filed 2010·Granted Apr 17, 2012·64 cites·14 claims
- 2196US5651923ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1995·Granted Jul 29, 1997·105 cites·21 claims
- 2296US5395567APhotochromic spironaphthopyran compoundsPPG INDUSTRIES INC·Filed 1994·Granted Mar 7, 1995·39 cites·15 claims
- 2395US7915415B2Metal complexes of cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1′,2′-c]quinazoline ligands and isoelectronic and benzannulated analogs thereofUNIVERSAL DISPLAY CORP·Filed 2007·Granted Mar 29, 2011·21 cites·28 claims
- 2495US5514817ASubstituted phenanthropyransPPG INDUSTRIES INC·Filed 1994·Granted May 7, 1996·74 cites·20 claims
- 2594US9893306B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2017·Granted Feb 13, 2018·4 cites·20 claims
- 2694US9722193B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2016·Granted Aug 1, 2017·4 cites·5 claims
- 2794US9281483B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2015·Granted Mar 8, 2016·5 cites·4 claims
- 2894US5552090APhotochromic naphthopyran compoundsPPG INDUSTRIES INC·Filed 1994·Granted Sep 3, 1996·57 cites·21 claims
- 2993US10403831B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2018·Granted Sep 3, 2019·3 cites·20 claims
- 3093US9028728B2Photochromic materials that include indeno-fused naphthopyransBANCROFT KEVIN E·Filed 2011·Granted May 12, 2015·62 cites·13 claims
- 3193US5573712ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1995·Granted Nov 12, 1996·70 cites·26 claims
- 3293US5565147APhotochromic naphthopyran compoundsTRANSITIONS OPTICAL INC·Filed 1995·Granted Oct 15, 1996·55 cites·22 claims
- 3392US8147725B2Photochromic materials having extended pi-conjugated systems and compositions and articles including the sameCHOPRA ANU·Filed 2010·Granted Apr 3, 2012·10 cites·11 claims
- 3492US8142909B2Blue phosphorescent imidazophenanthridine materialsBEERS SCOTT·Filed 2008·Granted Mar 27, 2012·47 cites·44 claims
- 3591US8388872B2Photochromic materials having extended pi-conjugated systems and compositions and articles including the sameCHOPRA ANU·Filed 2012·Granted Mar 5, 2013·9 cites·11 claims
- 3691US5658500ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1995·Granted Aug 19, 1997·60 cites·20 claims
- 3791US4986934APhotochromic compound and articles containing the samePPG INDUSTRIES INC·Filed 1988·Granted Jan 22, 1991·34 cites·26 claims
- 3890US10158090B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2018·Granted Dec 18, 2018·4 cites·20 claims
- 3989US5656206ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1995·Granted Aug 12, 1997·52 cites·25 claims
- 4088US5585042APhotochromic naphthopyransTRANSITIONS OPTICAL INC·Filed 1994·Granted Dec 17, 1996·35 cites·22 claims
- 4185US9065063B2Metal complexes of cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1′,2′-c]quinazoline ligands and isoelectronic and benzannulated analogs thereofUNIVERSAL DISPLAY CORP·Filed 2014·Granted Jun 23, 2015·2 cites·3 claims
- 4285US5650098ASubstituted naphthopyransTRANSITIONS OPTICAL INC·Filed 1995·Granted Jul 22, 1997·73 cites·20 claims
- 4383US7011897B2Organic light emitting materials and devicesUNIVERSAL DISPLAY CORP·Filed 2003·Granted Mar 14, 2006·27 cites·73 claims
- 4482US7911676B2Photochromic optical articles prepared with reversible thermochromic materialsTRANSITIONS OPTICAL INC·Filed 2009·Granted Mar 22, 2011·9 cites·16 claims
- 4582US7029765B2Organic light emitting devices having reduced pixel shrinkageUNIVERSAL DISPLAY CORP·Filed 2003·Granted Apr 18, 2006·43 cites·18 claims
- 4679US7851072B2Stable and efficient electroluminescent materialsUNIVERSAL DISPLAY CORP·Filed 2006·Granted Dec 14, 2010·7 cites·11 claims
- 4778US10749121B2Organic electroluminescent materials and devicesUNIVERSAL DISPLAY CORP·Filed 2019·Granted Aug 18, 2020·0 cites·20 claims
- 4878US8547625B2Photochromic optical articles prepared with reversible thermochromic materialsKNOWLES DAVID B·Filed 2010·Granted Oct 1, 2013·3 cites·8 claims
- 4978US8277699B2Photochromic materials that include 6-amino substituted indeno-fused naphthopyransCHOPRA ANU·Filed 2011·Granted Oct 2, 2012·2 cites·17 claims
- 5078US5674432APhotochromic naphthopyran compoundsTRANSITIONS OPTICAL INC·Filed 1995·Granted Oct 7, 1997·41 cites·17 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →