Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6423247 | Phosphorescent pigment and process for preparing the same | Mizue Fukushima, Hiroshi Hirashima, Oh Junrok | 2002-07-23 |
| 6397806 | Engine valve assembly for internal combustion engine | Hirokazau Uehara, Seiji Tsuruta | 2002-06-04 |