Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6833953 | Polarizer and optical device using the polarizer | Toshiaki Hashizume | 2004-12-21 |
| 6686083 | Carbonaceous composite material, process for production thereof, fuel cell separator, and polymer electrolyte fuel cell | Kazuo Saito, Atsushi Hagiwara, Takashi Maki | 2004-02-03 |