Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5186835 | Porous hydrophilic polypropylene membrane, method for production thereof, and blood plasma separation apparatus | Okihiko Hirasa, Makoto Onishi, Yukio Seita | 1993-02-16 |
| 4845132 | Hydrophilic porous membrane, method for production thereof, and plasma separator using said membrane | Okihiko Hirasa, Yoshio Suda, Makoto Onishi, Yukio Seita | 1989-07-04 |