Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6778654 | System for transfer control of telephone line | Sunao Takatori, Changmine Zhou | 2004-08-17 |
| 6763231 | Radio communication device, parent communication device, parent-child communication device and radio communication system | Sunao Takatori | 2004-07-13 |