Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860366 | Teleconference system using expanders for emphasizing a desired signal with respect to undesired signals | Hitoshi Fuda, Taisuke Sasada | 1989-08-22 |
| 4658420 | Tone responsible disabler circuit for an echo canceller | Yukio Hagiwara | 1987-04-14 |
| 4633046 | Adaptive echo canceller | Seishi Kitayama, Tsutomu Washida, Yoshinori Ito | 1986-12-30 |