Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7778243 | Method for DTMF transfer by RTP | Yoshie Yamaguchi, Makoto Kumada, Yusuke Sato, Masayuki Ono | 2010-08-17 |
| 7567269 | Television phone adaptor | Shinji Sakano, Kanji Tabeya | 2009-07-28 |