Inventor
KWAN WING SUM VINCENT
US32 patents
⚠️ This page may combine multiple inventors who share the name “KWAN WING SUM VINCENT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SANFORD LP
17 patentsUS6905539B2Jun 14, 2005
Black eradicable ink, methods of eradication of the same, eradicable ink kit, and eradicated ink complex
SANFORD LP30 citations91
US7981210B2Jul 19, 2011
Capillary-action, glitter markers and ink compositions for same
SANFORD LP17 citations90
US7364614B2Apr 29, 2008
Capillary-action, glitter markers and ink compositions for same
SANFORD LP17 citations90
US8889590B2Nov 18, 2014
Irreversible thermochromic ink compositions
SANFORD LP8 citations84
US7442725B2Oct 28, 2008
Color changing correction fluid
SANFORD LP9 citations82
US7488380B2Feb 10, 2009
Highlighting marking compositions, highlighting kits, and highlighted complexes
SANFORD LP12 citations77
US7163575B2Jan 16, 2007
Water-based, resin-free and solvent-free eradicable ball-pen inks
SANFORD LP12 citations77
US10245877B2Apr 2, 2019
Ink delivery system
SANFORD LP3 citations66
US7481593B2Jan 27, 2009
Combination hydrophobic/hydrophilic filters/reservoirs for controlling fluid flow
SANFORD LP5 citations63
US7455724B2Nov 25, 2008
Decoder system
SANFORD LP5 citations63
US11753558B2Sep 12, 2023
Dry erase inks and associated writing instruments
SANFORD LP0 citations62
USRE49400EJan 31, 2023
Metallic ink composition and writing instrument containing same
SANFORD LP0 citations62
US12064989B2Aug 20, 2024
Writing instruments and associated methods
SANFORD LP0 citations54
US11110738B2Sep 7, 2021
Writing instruments and associated methods
SANFORD LP0 citations54
US12338352B2Jun 24, 2025
Dry erase inks, and associated methods and writing instruments
SANFORD LP0 citations53
US12209192B2Jan 28, 2025
Opaque ink formulations and associated writing instruments
SANFORD LP0 citations53
US9809722B2Nov 7, 2017
Transitorially erasable ink compositions and writing instruments containing same
SANFORD LP0 citations50
VIDEOJET SYSTEMS INT
5 patentsUS5922121AJul 13, 1999
Hydrophobic treatment of pigments
VIDEOJET SYSTEMS INT20 citations92
US6024789AFeb 15, 2000
Method of preparing iron-containing pigment with enhanced dispersibility in both polar and nonpolar solvents
VIDEOJET SYSTEMS INT8 citations73
US5865885AFeb 2, 1999
Hydrophilic treatment of pigments
VIDEOJET SYSTEMS INT5 citations63
US5855661AJan 5, 1999
Pigment dispersion
VIDEOJET SYSTEMS INT2 citations63
US5849074ADec 15, 1998
Method for preparing magnetic ink and dry pigment particles used therefor
VIDEOJET SYSTEMS INT5 citations63
MARCONI DATA SYSTEMS INC
4 patentsUS6210472B1Apr 3, 2001
Transparent coating for laser marking
MARCONI DATA SYSTEMS INC126 citations97
US6235829B1May 22, 2001
Modification of chargeable pigment particles
MARCONI DATA SYSTEMS INC76 citations96
US6261348B1Jul 17, 2001
Laser markable coating
MARCONI DATA SYSTEMS INC39 citations92
US6179907B1Jan 30, 2001
Black iron oxide with improved heat stability and method of preparing same
MARCONI DATA SYSTEMS INC3 citations54
KWAN WING SUM VINCENT
4 patentsUS8652996B2Feb 18, 2014
Irreversible thermochromic pigment capsules
KWAN WING SUM VINCENT6 citations83
US8865621B2Oct 21, 2014
Irreversible color changing ink compositions
KWAN WING SUM VINCENT4 citations72
US9163153B2Oct 20, 2015
Metallic ink composition and writing instrument containing same
KWAN WING SUM VINCENT1 citations51
US8709973B2Apr 29, 2014
Irreversible thermochromic ink compositions
KWAN WING SUM VINCENT1 citations51