Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8036251 | Packet transmission device and control method thereof | Yuichiro Oishi | 2011-10-11 |
| 6661850 | Testing system of voice-band data transmission interface on an exchange | — | 2003-12-09 |