Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5701293 | Trouble surveillance apparatus for a transmission system | — | 1997-12-23 |
| 5638514 | Centralized supervisory system for supervising network equipments based on data indicating operation states thereof | Kojun Yoshida, Toshihito Kaneshima | 1997-06-10 |