Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5324764 | Erasable ink composition for writing on impervious surface | Hisanori Fujita | 1994-06-28 |
| 5316574 | Erasable ink composition for writing on impervious surface | Hisanori Fujita | 1994-05-31 |