Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12421387 | Polyester film and method for producing same | Takayoshi Okuzu, Ken Akamatsu, Hiroshi Ashihara, Goro Araki, Akito Kajita | 2025-09-23 |
| 11326032 | Polyamide film and production method for same | Takayoshi Okuzu, Ken Akamatsu | 2022-05-10 |