Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625178 | Virtual private line control system with improved transmission efficiency | Takashi Okumura | 2003-09-23 |
| 6507580 | Method of controlling a calling in distributed node exchange network, distributed node exchange and distributed node exchange network | Isao OISHI | 2003-01-14 |
| 6327360 | System for managing office data in an exchange, subscriber's number assigning system, and same number migrating system | — | 2001-12-04 |
| 5987025 | ATM relay system capable of carrying out relay connection on ATM cells as it is | — | 1999-11-16 |
| 5455855 | System for connecting public network subscriber and private network subscriber | — | 1995-10-03 |
| 5442622 | Communication system with | — | 1995-08-15 |
| 5414760 | Exchange for an | — | 1995-05-09 |
| 5289536 | Least cost routing method according to information transfer capability of customer premises equipment | — | 1994-02-22 |
| 5212691 | Private network with means for establishing virtual tie trunks between PBXS through | — | 1993-05-18 |