Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8741039 | Permanent ink compositions and writing instruments containing same | — | 2014-06-03 |
| 8562729 | Highlighting ink formulation comprising an anti-smear agent | — | 2013-10-22 |
| 6726756 | Continuous ink jet printing ink composition | Wan Kang Zou, Linfang Zhu, Xuedong Zhan, Fengfei Xiao | 2004-04-27 |
| 6444019 | Ink jet ink composition | Wan Kang Zou, Carrie Woodcock, Qiao Qiao Dong, Fengfei Xiao | 2002-09-03 |
| 5981625 | Non-rub off printing inks | Wan Kang Zou, Qiao Qiao Dong | 1999-11-09 |