Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4921653 | Method of forming a porous polyolefin film | Michiyasu Ito, Syoichi Tsuji, Toshiyuki Ishii, Tomohide Tanaka | 1990-05-01 |
| 4814124 | Preparation of gas permeable porous film | Michiyasu Ito, Syoichi Tsuji, Toshiyuki Ishii, Tomohide Tanaka | 1989-03-21 |