Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646712 | Command system for performing centralized management of data in a command desk | Hiroshi Endo | 2003-11-11 |
| 5471525 | Line status display system for telephone exchange system | Yoshihisa Domoto, Toshie Takahashi | 1995-11-28 |
| 5465292 | Trading telephone | Toshie Takahashi, Takashi Sato, Yoshiyuki Kokubun | 1995-11-07 |