Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8127027 | Telephone system, server, and terminal device | — | 2012-02-28 |
| 8023625 | Communication system and voice mail apparatus | — | 2011-09-20 |
| 7860082 | Telephone system and terminal device therein | — | 2010-12-28 |
| 7194074 | Key telephone system, key telephone, interface unit, and transmission scheme determination method | — | 2007-03-20 |
| 7039019 | Telephone exchanging apparatus and telephone system | Koji Shima, Yoichi Naito | 2006-05-02 |
| 6978000 | Key telephone system and interface unit for key telephone | — | 2005-12-20 |