Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697272 | Method of perforating film | Takeshi Kanaoka, Junichi Tsuchiya, Susumu Sato | 1997-12-16 |
| 5697273 | Method of perforating film | Takeshi Kanaoka, Junichi Tsuchiya, Susumu Sato | 1997-12-16 |
| 5673602 | Method and apparatus for making perforations continuously | Hiroshi Seikai, Koichi Takahashi, Mituru Suzuki | 1997-10-07 |