Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7140855 | Inner mandrel | Koji Watanabe, Shinji Murakami | 2006-11-28 |
| 4983337 | Method and apparatus for producing stretched film | Naoya Yamaguchi, Kazuhiro Tomoda, Tomoji Mizutani | 1991-01-08 |
| 4968464 | Process for producing a porous resin film | Naoya Yamaguchi, Kazuhiro Tomoda, Tomoji Mizutani, Yukio Wakuda | 1990-11-06 |