Inventor · disambiguated record
Wing Sum Vincent Kwan
Also filed as: KWAN WING S V · KWAN WING SUM V · KWAN WING SUM VINCENT
33 granted patents·5 pending applications·478 citations·filing 1996–2021
97Inventor score
Files withSANFORD LP20VIDEOJET SYSTEMS INT5KWAN WING SUM VINCENT4MARCONI DATA SYSTEMS INC4KWAN WING SUM V1
Top patents by PatentIndex Score
38 records- 0198US6210472B1Transparent coating for laser markingMARCONI DATA SYSTEMS INC·Filed 1999·Granted Apr 3, 2001·126 cites·39 claims
- 0296US6478861B1Laser markable coatingVIDEOJET TECHNOLOGIES INC·Filed 2000·Granted Nov 12, 2002·58 cites·59 claims
- 0395US8889590B2Irreversible thermochromic ink compositionsSANFORD LP·Filed 2013·Granted Nov 18, 2014·8 cites·20 claims
- 0492US7981210B2Capillary-action, glitter markers and ink compositions for sameSANFORD LP·Filed 2008·Granted Jul 19, 2011·17 cites·47 claims
- 0592US6235829B1Modification of chargeable pigment particlesMARCONI DATA SYSTEMS INC·Filed 1998·Granted May 22, 2001·76 cites·22 claims
- 0691US8652996B2Irreversible thermochromic pigment capsulesKWAN WING SUM VINCENT·Filed 2011·Granted Feb 18, 2014·6 cites·13 claims
- 0788US8865621B2Irreversible color changing ink compositionsKWAN WING SUM VINCENT·Filed 2012·Granted Oct 21, 2014·4 cites·22 claims
- 0888US6905539B2Black eradicable ink, methods of eradication of the same, eradicable ink kit, and eradicated ink complexSANFORD LP·Filed 2003·Granted Jun 14, 2005·30 cites·42 claims
- 0986US10245877B2Ink delivery systemSANFORD LP·Filed 2017·Granted Apr 2, 2019·3 cites·20 claims
- 1085US7488380B2Highlighting marking compositions, highlighting kits, and highlighted complexesSANFORD LP·Filed 2006·Granted Feb 10, 2009·12 cites·34 claims
- 1183US7455724B2Decoder systemSANFORD LP·Filed 2005·Granted Nov 25, 2008·5 cites·18 claims
- 1281US8846797B2Metallic ink composition and writing instrument containing sameSEXTON MARTIN N·Filed 2012·Granted Sep 30, 2014·3 cites·40 claims
- 1381US7364614B2Capillary-action, glitter markers and ink compositions for sameSANFORD LP·Filed 2004·Granted Apr 29, 2008·17 cites·51 claims
- 1481US6261348B1Laser markable coatingMARCONI DATA SYSTEMS INC·Filed 1999·Granted Jul 17, 2001·39 cites·31 claims
- 1580US8664156B2Irreversible thermochromic ink compositionsKWAN WING SUM V·Filed 2011·Granted Mar 4, 2014·3 cites·19 claims
- 1676US9163153B2Metallic ink composition and writing instrument containing sameKWAN WING SUM VINCENT·Filed 2013·Granted Oct 20, 2015·1 cites·22 claims
- 1775US7163575B2Water-based, resin-free and solvent-free eradicable ball-pen inksSANFORD LP·Filed 2004·Granted Jan 16, 2007·12 cites·42 claims
- 1874USRE49400EMetallic ink composition and writing instrument containing sameSANFORD LP·Filed 2020·Granted Jan 31, 2023·0 cites·44 claims
- 1974US8709973B2Irreversible thermochromic ink compositionsKWAN WING SUM VINCENT·Filed 2011·Granted Apr 29, 2014·1 cites·19 claims
- 2073US12064989B2Writing instruments and associated methodsSANFORD LP·Filed 2021·Granted Aug 20, 2024·0 cites·8 claims
- 2173US11753558B2Dry erase inks and associated writing instrumentsSANFORD LP·Filed 2020·Granted Sep 12, 2023·0 cites·19 claims
- 2270US7442725B2Color changing correction fluidSANFORD LP·Filed 2004·Granted Oct 28, 2008·9 cites·29 claims
- 2369US12338352B2Dry erase inks, and associated methods and writing instrumentsSANFORD LP·Filed 2019·Granted Jun 24, 2025·0 cites·15 claims
- 2466US11110738B2Writing instruments and associated methodsSANFORD LP·Filed 2018·Granted Sep 7, 2021·0 cites·18 claims
- 2560US12209192B2Opaque ink formulations and associated writing instrumentsSANFORD LP·Filed 2018·Granted Jan 28, 2025·0 cites·19 claims
- 2660US9809722B2Transitorially erasable ink compositions and writing instruments containing sameSANFORD LP·Filed 2015·Granted Nov 7, 2017·0 cites·20 claims
- 2760US5922121AHydrophobic treatment of pigmentsVIDEOJET SYSTEMS INT·Filed 1996·Granted Jul 13, 1999·20 cites·35 claims
- 2858US7481593B2Combination hydrophobic/hydrophilic filters/reservoirs for controlling fluid flowSANFORD LP·Filed 2004·Granted Jan 27, 2009·5 cites·23 claims
- 2951US6024789AMethod of preparing iron-containing pigment with enhanced dispersibility in both polar and nonpolar solventsVIDEOJET SYSTEMS INT·Filed 1998·Granted Feb 15, 2000·8 cites·7 claims
- 3050US2014186531A1Compositions For Generating On-Demand Dry-Erase Writing Surfaces, Fluid Applicators Containing Same, And MethodsSANFORD LP·Filed 2013·Application pending·0 cites
- 3146US2005192379A1Eradicable composition and kitFiled 2005·Application pending·0 cites
- 3244US2006105091A1Non-toxic lava fluids for use in children's productsSANFORD LP·Filed 2004·Application pending·0 cites
- 3342US2023339255A1Writing nib assemblies and writing instrumentsSANFORD LP·Filed 2020·Application pending·0 cites
- 3441US2005043436A1High gloss inks and preparations thereofFiled 2004·Application pending·0 cites
- 3535US5865885AHydrophilic treatment of pigmentsVIDEOJET SYSTEMS INT·Filed 1996·Granted Feb 2, 1999·5 cites·29 claims
- 3635US5849074AMethod for preparing magnetic ink and dry pigment particles used thereforVIDEOJET SYSTEMS INT·Filed 1996·Granted Dec 15, 1998·5 cites·15 claims
- 3732US5855661APigment dispersionVIDEOJET SYSTEMS INT·Filed 1996·Granted Jan 5, 1999·2 cites·25 claims
- 3830US6179907B1Black iron oxide with improved heat stability and method of preparing sameMARCONI DATA SYSTEMS INC·Filed 1998·Granted Jan 30, 2001·3 cites·13 claims
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