Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6594069 | Control method and control apparatus of optical wavelength variable filter | Tadao Nakazawa | 2003-07-15 |
| 6583900 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hiroshi Onaka, Kazue Otsuka, Yutaka Kai, Tadao Nakazawa, Terumi Chikama | 2003-06-24 |
| 6545784 | Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit | Kazue Okazaki, Hiroshi Onaka, Yutaka Kai, Terumi Chikama | 2003-04-08 |