Assignee
KWAN WING SUM VINCENT
US·4 granted patents·12 citations·filing 2011–2013
Top patents by PatentIndex Score
4 records- 0191US8652996B2Irreversible thermochromic pigment capsulesKWAN WING SUM VINCENT·Filed 2011·Granted Feb 18, 2014·6 cites·13 claims
- 0288US8865621B2Irreversible color changing ink compositionsKWAN WING SUM VINCENT·Filed 2012·Granted Oct 21, 2014·4 cites·22 claims
- 0376US9163153B2Metallic ink composition and writing instrument containing sameKWAN WING SUM VINCENT·Filed 2013·Granted Oct 20, 2015·1 cites·22 claims
- 0474US8709973B2Irreversible thermochromic ink compositionsKWAN WING SUM VINCENT·Filed 2011·Granted Apr 29, 2014·1 cites·19 claims
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