Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D463399 | Hands free speakerphone | — | 2002-09-24 |
| 6272360 | Remotely installed transmitter and a hands-free two-way voice terminal device using same | Noboru Yamaguchi | 2001-08-07 |
| 5844984 | Two-way communications earset with filter | Noboru Yamaguchi | 1998-12-01 |
| D396715 | Hands-free speakerphone for automobile | — | 1998-08-04 |
| 5751822 | Ambient noise suppression circuit | Noboru Yamaguchi | 1998-05-12 |
| 5664014 | Two-way communications earset | Noboru Yamaguchi | 1997-09-02 |
| 5606607 | Two-way communications earset | Noboru Yamaguchi | 1997-02-25 |
| 5448637 | Two-way communications earset | Noboru Yamaguchi | 1995-09-05 |
| 5282253 | Bone conduction microphone mount | — | 1994-01-25 |
| 4588867 | Ear microphone | — | 1986-05-13 |
| 4516428 | Acceleration vibration detector | — | 1985-05-14 |