Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5286324 | Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the porous membrane and the separator | Takashi Kawai, Toshio Yoshioka | 1994-02-15 |
| 5158680 | Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the porous membrane and the separator | Takashi Kawai, Toshio Yoshioka | 1992-10-27 |