Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7961855 | Voice communications apparatus | Masashi Takada, Hiromi Aoyagi | 2011-06-14 |
| 7924824 | Voice packet communications system with communications quality evaluation function | Hiromi Aoyagi, Atsushi Yokoyama, Nobuyuki Yamaguchi | 2011-04-12 |
| 7848495 | Voice communication apparatus | Masashi Takada, Hiromi Aoyagi | 2010-12-07 |
| 7792255 | Voice communications apparatus | Masashi Takada, Hiromi Aoyagi | 2010-09-07 |
| 7489678 | Voice packet communications system with communications quality evaluation function | Hiromi Aoyagi, Atsushi Yokoyama, Nobuyuki Yamaguchi | 2009-02-10 |
| 7231036 | Anti-howling circuit detecting howling from effect of predicted echo signal | — | 2007-06-12 |
| 7123607 | Quality control device for voice packet communications | Atsushi Yokoyama, Hiromi Aoyagi, Nobuyuki Yamaguchi | 2006-10-17 |
| 6885659 | Voice packet communications system with communications quality evaluation function | Hiromi Aoyagi, Atsushi Yokoyama, Nobuyuki Yamaguchi | 2005-04-26 |
| 6826496 | Circuitry for and a method of detecting tonal signals with the processing capacity distributed with weight to frequency and time domains | Nobuyuki Yamaguchi, Hiromi Aoyagi, Atsushi Yokoyama | 2004-11-30 |