Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819828 | Method and device for optical fiber transmission | Tsukasa Takahashi, Toshihiro Ohtani | 2004-11-16 |
| 6813410 | Optical switch for compensating for degradation of optical-coupling characteristic | — | 2004-11-02 |
| 6810215 | Optical repeater converting wavelength and bit rate between networks | — | 2004-10-26 |
| 6748130 | Optical switch and using method therefor | — | 2004-06-08 |