Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351860 | Polyaryl ether sulfone semipermeable membrane and process for producing same | goichi Yoshida, Fusakazu Hayano | 1982-09-28 |
| 4286015 | Polyaryl ether sulfone semipermeable membrane and process for producing same | Koichi Yoshida, Fusakazu Hayano | 1981-08-25 |