Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699423 | Telephone set in which an echo signal is effectively cancelled in spite of being provided with a plurality of sound producing units | Toshio Yoshida | 1997-12-16 |
| 5617112 | Display control device for controlling brightness of a display installed in a vehicular cabin | Toshio Yoshida | 1997-04-01 |
| 5617472 | Noise suppression of acoustic signal in telephone set | Toshio Yoshida | 1997-04-01 |