Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876289 | Hydrophilized porous membrane and production process thereof | Kazutami Mitani | 1989-10-24 |
| 4869857 | Process for producing porous membranes | Hiroshi Takahashi, Kouji Ohbori, Hideaki Habara | 1989-09-26 |
| 4802942 | Method of making multilayer composite hollow fibers | Tohru Takemura, Jun Kamo, Haruhiko Yoshida | 1989-02-07 |