Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5206721 | Television conference system | Youichi Ashida, Ryusaku Imai, Yuji Yoshida, Toshihiro Homma, Hitoshi Sato +2 more | 1993-04-27 |
| 5003532 | Multi-point conference system | Youichi Ashida, Yuji Yoshida, Hitoshi Sato, Hiroaki Natori | 1991-03-26 |