Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645766 | Film of aromatic polyethersulfone process for the production thereof and solution composition for the production thereof | Takashi Shiro, Kaoru Iwata, Takeshi Sasaki, Utami Yonemura | 1997-07-08 |