Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5296510 | Method for treating the surface of a thin porous film material of tetrafluoroethylene resin | Katsuya Yamada, Koichi Okita, Shigeru Asako | 1994-03-22 |
| 5252626 | Method for treating the surface of a thin porous film material | Katsuya Yamada, Koichi Okita, Shigeru Asako | 1993-10-12 |
| 5219894 | Method for treating the surface of a thin porous film material | Katsuya Yamada, Koichi Okita, Shigeru Asako | 1993-06-15 |