Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4665494 | Spectrum display device for audio signals | Yoshiaki Tanaka, Zenju Otsuki | 1987-05-12 |
| 4612665 | Graphic equalizer with spectrum analyzer and system thereof | Yoshiaki Tanaka | 1986-09-16 |
| 4577188 | Level display device for audio signal | Yoshiaki Tanaka, Zenju Ohtsuki | 1986-03-18 |
| 4559569 | Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field | Zenju Otsuki | 1985-12-17 |
| 4553179 | Automatic recording bias current setting apparatus | Zenju Ohtsuki, Yoshiaki Tanaka, Tomohiro Mori, Akio Hasegawa | 1985-11-12 |
| 4546690 | Apparatus for displaying musical notes indicative of pitch and time value | Yoshiaki Tanaka, Zenju Otsuki | 1985-10-15 |
| 4510840 | Musical note display device | Yoshiaki Tanaka, Zenju Otsuki | 1985-04-16 |
| 4504870 | Automatic level adjustment with means for minimizing drop-out effects | Masatsugu Kitamura, Yoshiaki Tanaka, Zenju Otsuki | 1985-03-12 |
| 4492917 | Display device for displaying audio signal levels and characters | Yoshiaki Tanaka, Zenju Ohtsuki | 1985-01-08 |
| 4489353 | Maximum output level automatic measuring apparatus | Zenju Ohtsuki, Yoshiaki Tanaka | 1984-12-18 |
| 4380732 | Signal spectrum display apparatus | Yoshiaki Tanaka | 1983-04-19 |
| 4339711 | Spectrum displaying apparatus for multichannel signals | Yoshiaki Tanaka | 1982-07-13 |
| 4307340 | Spectrum display apparatus | Yoshiaki Tanaka | 1981-12-22 |
| 4217578 | Fluorescent indicator tube and related circuit | Yoshiaki Tanaka | 1980-08-12 |