Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7452146 | Writing instruments with eradicable inks and eradicating fluids | — | 2008-11-18 |
| 7297729 | Solvent system and ink made therefrom | Martin N. Sexton | 2007-11-20 |
| 7229487 | Writing instruments with eradicable inks and eradicating fluids | — | 2007-06-12 |
| 7163575 | Water-based, resin-free and solvent-free eradicable ball-pen inks | Wing Sum Vincent Kwan | 2007-01-16 |
| 6905539 | Black eradicable ink, methods of eradication of the same, eradicable ink kit, and eradicated ink complex | Sanjay V. Patel, Wing Sum Vincent Kwan | 2005-06-14 |