Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7778243 | Method for DTMF transfer by RTP | Yoshie Yamaguchi, Masahito Hirokawa, Makoto Kumada, Yusuke Sato | 2010-08-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7778243 | Method for DTMF transfer by RTP | Yoshie Yamaguchi, Masahito Hirokawa, Makoto Kumada, Yusuke Sato | 2010-08-17 |