Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6496518 | SDH transmission system, and frame transmission method in SDH transmission system and SDH transmission unit | — | 2002-12-17 |
| 6456587 | Ring transmission system and squelch method used for same | — | 2002-09-24 |
| 6337848 | Path switching device for transmission apparatus | Kazuo Takatsu | 2002-01-08 |