Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6831341 | Photocathode having AlGaN layer with specified Mg content concentration | Hirofumi Kan, Minoru Niigaki, Yasufumi Takagi, Shoichi Uchiyama | 2004-12-14 |
| 6757484 | Data recording/reproducing device | Hajime Nitta, Toshimichi Hamada, Kiyoshi Ota | 2004-06-29 |
| 6728473 | Moving picture recording and reproduction apparatus and method as well as medium | Koichi Chotoku, Toshimichi Hamada | 2004-04-27 |