Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833160 | 3-(3,5-di-tert-butyl-4-hydroxy benzylidene)-2-pyrrolidone and substituted derivatives thereof | Hironori Ikuta, Youji Yamagishi, Kozo Akasaka, Isao Yamatsu, Seiichi Kobayashi +1 more | 1989-05-23 |