Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868878 | Sound field correction system | Yoshiro Kunugi, Akio Tokumo, Toshikazu Yoshimi, Yoshio Sasaki, Shinjiro Kato +2 more | 1989-09-19 |
| 4742310 | Automatic sound volume controlling device for use in automotive vehicle | Masayuki Kato, Yoshio Sasaki | 1988-05-03 |
| 4648117 | Mobile sound field correcting device | Yoshiro Kunugi, Akio Tokumo, Toshikazu Yoshimi, Shinjiro Kato, Yoshio Sasaki +1 more | 1987-03-03 |
| 4644292 | Automatic gain and frequency characteristic control unit in audio device | Yoshiro Kunugi, Takeshi Sato, Yoshio Sasaki, Akio Tokumo | 1987-02-17 |
| 4622691 | Mobile sound field correcting device | Akio Tokumo, Yoshiro Kunugi, Toshikazu Yoshimi, Shinjiro Kato, Yoshio Sasaki +1 more | 1986-11-11 |