Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4548769 | Process for producing semipermeable membrane | Fumio Fujita, Manabu Hirakawa | 1985-10-22 |
| 4511711 | Process for producing semipermeable membrane | Fumio Fujita, Manabu Hirakawa | 1985-04-16 |
| 4330406 | Semipermeable membrane and process of making same | Takezo Sano, Masao Sasaki | 1982-05-18 |
| 4272378 | Semipermeable membrane | Takezo Sano, Masao Sasaki, Ichiki Murase | 1981-06-09 |
| 4268662 | Process for improving semipermeable membranes by treating with protic acids or inorganic salts | Takezo Sano, Ichiki Murase | 1981-05-19 |
| 4265959 | Process for producing semipermeable membranes | Takezo Sano, Ichiki Murase, Manabu Hirakawa | 1981-05-05 |