Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4431762 | Ultraviolet light screening resin composition | Shingo Araki, Keizo Asai | 1984-02-14 |
| 4208318 | Method for coloring thermoplastic resins | Koichi Shibuya | 1980-06-17 |
| 4183842 | Method for clear-coloring of linear aromatic polyester | Kouichi Shibuya, Hiroshi Marikawa | 1980-01-15 |