Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621021 | Erasable writing ink composition | Koji Yoshioka, Yasuaki Ogiwara, Kyoko Kobayashi | 1997-04-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621021 | Erasable writing ink composition | Koji Yoshioka, Yasuaki Ogiwara, Kyoko Kobayashi | 1997-04-15 |