Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871793 | Polyphenylene sulfide resin compositions having improved resistance to deterioration when exposed to light and containing alkylidene bis (benzotriazolylphenols) | Yutaka Nakahara, Toshio Nakajima | 1989-10-03 |
| 4812498 | Polycarbonate resin compositions having improved resistance to deterioration when exposed to light and containing alkylidene bis(benzotriazolyl phenols) | Yutaka Nakahara, Toshio Nakajima | 1989-03-14 |