Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5513265 | Multi-channel echo cancelling method and a device thereof | — | 1996-04-30 |
| 5396554 | Multi-channel echo canceling method and apparatus | Akihiko Sugiyama | 1995-03-07 |
| 5371789 | Multi-channel echo cancellation with adaptive filters having selectable coefficient vectors | — | 1994-12-06 |
| 5323459 | Multi-channel echo canceler | — | 1994-06-21 |
| 5152028 | Upright vacuum cleaner | — | 1992-10-06 |
| 5024108 | Sample analyzer | Yasuyuki Nishioka | 1991-06-18 |
| 4977640 | Floor nozzle for vacuum cleaner | Seizo Hayashi | 1990-12-18 |
| 4705669 | Gas analyzer for simultaneously measuring many ingredients | Katsuya Tsuji, Masahiro Tanimoto, Takeshi Yamada | 1987-11-10 |