Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6833538 | Device for determining focused state of taking lens | Tadashi Sasaki, Masao Wada, Tetsuji Inoue, Ryoji Kumaki, Shinobu Nakamura +3 more | 2004-12-21 |
| 6822801 | Device for determining focused state of taking lens | Satoshi Yahagi, Masao Wada, Tetsuji Inoue, Ryoji Kumaki, Shinobu Nakamura +3 more | 2004-11-23 |
| 6804370 | Speaker capable to playback in wide frequency range | — | 2004-10-12 |
| 6678134 | Digital protective relay system | Itsuo Shuto, Hachidai Ito, Masamichi Saga | 2004-01-13 |