Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8588388 | Telephone system and server apparatus and control method used in telephone system | Yasumasa Sasaki, Motohisa Araki, Toshio Nishida | 2013-11-19 |
| 8565224 | Telephone system, telephone exchange apparatus, and connection control method used in telephone exchange apparatus | — | 2013-10-22 |
| 7616626 | Telephone exchange apparatus and control method for telephone exchange apparatus | — | 2009-11-10 |
| 6876732 | Service providing method for electronic device, customer center, and user system | Seiichi Yamamoto, Hitoshi Kato, Yoshihiro Kawauchi, Yasuo Funato, Takeshi Makita | 2005-04-05 |