Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4921652 | Process for producing a porous film | Syoichi Tsuji, Syoichi Ito, Shuji Matsumura, Michiyasu Ito | 1990-05-01 |
| 4705812 | Process for producing porous films involving a stretching step and the resultant product | Keiko Ito, Michiyasu Ito, Shoichi Tsuji | 1987-11-10 |
| 4705813 | Process for producing porous films involving a stretching step and the resultant film | Keiko Ito, Michiyasu Ito, Shoichi Tsuji, Shoichi Ito | 1987-11-10 |
| 4699733 | Resin compostion for porous film and film prepared therefrom | Shuji Matsumura, Michiyasu Ito, Syoichi Tsuji, Syoichi Ito | 1987-10-13 |