Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487279 | Telephone terminal and telephone exchange system accommodating the terminal | Takashi Sato | 2002-11-26 |
| 6044136 | Telephone terminal and telephone exchange system accommodating the terminal | Takashi Sato | 2000-03-28 |
| 5471525 | Line status display system for telephone exchange system | Yoshihisa Domoto, Toshimi Kurumada | 1995-11-28 |
| 5465292 | Trading telephone | Takashi Sato, Toshimi Kurumada, Yoshiyuki Kokubun | 1995-11-07 |