Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845185 | Soluble copolyimide from 9,9-bis (4-amino phenyl) fluorene | Kazuaki Harada, Hiroharu Inoue | 1989-07-04 |
| 4833214 | Soluble heat-resistant aromatic polyamide terminated with aromatic amido moieties | Kazuaki Harada, Hiroharu Inoue | 1989-05-23 |
| 4810771 | Heat-resistant co-polyester from 9,9-bis(4-hydroxy-phenyl)fluorene | Takashi Usami | 1989-03-07 |