Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6731111 | Validity determination using magnetic ink having magnetic powders with different Curie temperatures | Takao Sawa, Katsutoshi Nakagawa, Tadahiko Kobayashi, Hisashi Takahashi, Masao Obama | 2004-05-04 |
| 6724521 | Electrophoresis display device | Hideyuki Nakao, Sadao Kajiura | 2004-04-20 |