Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5047560 | Process for producing highly pure 3,3',4,4'-biphenyltetracarboxylic acid or dianhydride thereof | Fusaji Shoji, Nobuo Aoki, Tsuyoshi Aoyama, Toshiyuki Kiriyu, Yoshinori Matsuzaki | 1991-09-10 |