Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816335 | High-quality polyarylene-thioether fibers and method for production thereof | Toshitaka Kouyama, Yo Iizuka, Zenya Shiiki | 1989-03-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816335 | High-quality polyarylene-thioether fibers and method for production thereof | Toshitaka Kouyama, Yo Iizuka, Zenya Shiiki | 1989-03-28 |