Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5217255 | Erasable system including marking surface and erasable ink composition | Nan J. Lin | 1993-06-08 |
| 4988123 | Erasable system including marking surface and erasable ink composition | Nan J. Lin | 1991-01-29 |
| 4940628 | Erasable system including marking surface and erasable ink composition | Nan J. Lin | 1990-07-10 |