Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5229446 | Polystyrene resin composition having improved stiffness | Masashi Sakamoto, Kiyoshi Koutou | 1993-07-20 |
| 4975486 | High-gloss rubber-reinforced polystyrene composition and method for continuous production thereof | Hideo Kasahara | 1990-12-04 |