Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5412021 | Water-base erasable ink composition for use in marking pens | — | 1995-05-02 |
| 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 |
| 5176746 | Oil ink composition | Takahiro Shirai | 1993-01-05 |
| 4578117 | Erasable ink composition | — | 1986-03-25 |
| 4525215 | Ink composition | Keiko Shioi | 1985-06-25 |
| 4525216 | Ink composition | — | 1985-06-25 |