Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6614753 | Terminal apparatus, device for detecting the mismatching of work/protection line bridging function in a synchronous communication network and the method | — | 2003-09-02 |
| 6147783 | Optical transmission system wherein protection terminal equipment converts alarm indication signal before relaying same to working terminal equipment | — | 2000-11-14 |
| 6141320 | Method and apparatus for nested automatic protection switching | — | 2000-10-31 |
| 5978354 | Optical transmission system and transmission line switching control method | Hisashi Taketomi, Hatsumi Iino, Kanji Naito, Junichi Moriyama | 1999-11-02 |
| 5757769 | Line switching control system in synchronous communication network system | — | 1998-05-26 |
| 5091796 | Optical communication system having an improved protection line switching mechanism | Koichi Nishimura, Ikuo Taniguchi, Masumi Kurokawa | 1992-02-25 |
| 5073774 | One-to-one switching system | — | 1991-12-17 |