Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6658020 | Voice data exchange system | Keiji Matsunuma, Yoshinori Sekine | 2003-12-02 |
| 6654455 | IP conference telephone system compatible with IP-PBX systems | — | 2003-11-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6658020 | Voice data exchange system | Keiji Matsunuma, Yoshinori Sekine | 2003-12-02 |
| 6654455 | IP conference telephone system compatible with IP-PBX systems | — | 2003-11-25 |