Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698301 | Phosphorescent article | — | 1997-12-16 |
| 5607621 | Phosphorescent synthetic resin material method for production thereof, and formed article | Kiyomitsu Ishihara, Yoshiharu Yamaguchi, Toru Koma | 1997-03-04 |