Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883717 | Vibration-damping material | Shuji Kitamura, Takuzo Okumura, Yoshio Tadokoro, Hiroo Toya, Yoshiaki Togawa +5 more | 1989-11-28 |
| 4861941 | Shielding device | Kazuhiko Kubo, Susumu Saitou, Akira Usui | 1989-08-29 |
| 4835492 | Voltage controlled oscillator having constant tuning bias voltage | Hideyuki Ikuhara, Akira Usui, Kazuhiko Kubo, Tetsuo Kutsuki | 1989-05-30 |
| 4817195 | Channel selection apparatus having automatic frequency compensation for transmission frequency error | Kazuhiko Kubo, Akira Usui, Minoru Miyata, Hideyuki Ikuhara, Tadashi Yamada | 1989-03-28 |
| 4806876 | High frequency amplifier circuit | Akira Usui, Seiji Sakashita, Kiyotake Fukui | 1989-02-21 |
| 4797638 | Oscillator including a transistor used both as constant current source and amplifier | Akira Usui, Kazuhiko Kubo | 1989-01-10 |