Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9419266 | Polyolefin resin porous film, and non-aqueous electrolyte cell separator using same | Takeyoshi Yamada, Yasushi Usami | 2016-08-16 |
| 8680169 | Porous polypropylene film | Takeyoshi Yamada, Yasushi Usami | 2014-03-25 |
| 8288033 | Laminated porous film, separator for lithium cell, and cell | Miho Yamamoto, Takeyoshi Yamada, Yasushi Usami | 2012-10-16 |