Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D622770 | Pen | — | 2010-08-31 |
| D619650 | Dual-tip highlighter | — | 2010-07-13 |
| D607512 | Dual-tip marker | Zhiming Qiu | 2010-01-05 |
| D591351 | Pen | — | 2009-04-28 |
| D590876 | Dual-tip highlighter | — | 2009-04-21 |
| D578572 | Pen | Zhiming Qiu | 2008-10-14 |
| D577066 | Pen | Feng Zhao | 2008-09-16 |
| D575336 | Highlighter | Zhiming Qiu | 2008-08-19 |
| D573183 | Dual-tip highlighter | Zhiming Qiu | 2008-07-15 |