Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818387 | Sulfonated polysulfone composite semipermeable membranes and process for producing the same | Kenichi Ikeda, Hiroki Ito | 1989-04-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818387 | Sulfonated polysulfone composite semipermeable membranes and process for producing the same | Kenichi Ikeda, Hiroki Ito | 1989-04-04 |