Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651889 | Sludge treatment membrane apparatus | Sakae Wataya, Hirokazu Shirage, Kouji Irie, Tadaaki Hashimoto | 1997-07-29 |
| 5035802 | Membrane filter material having excellent organic solvent resistance, method for formation of membrane filter and process for preparation of bismaleimide polymer to be used for membrane filter | Kazuyuki Yamasaki, Masanobu Watanabe, Kojiro Kan, Yoshio Nakayama | 1991-07-30 |
| 4983717 | Membrane filter material having excellent organic solvent resistance, method for formation of membrane filter and process for preparation of bismaleimide polymer to be used for membrane filter | Kazuyuki Yamasaki, Masanobu Watanabe, Kojiro Kan, Yoshio Nakayama | 1991-01-08 |