Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861941 | Shielding device | Susumu Saitou, Akira Usui, Hiroyuki Nagai | 1989-08-29 |
| 4853351 | Silica shaped bodies and process for preparing same | Akira Takahashi, Kazuo Shibahara, Katsuhiro Morimoto, Hiromasa Samma | 1989-08-01 |
| 4835492 | Voltage controlled oscillator having constant tuning bias voltage | Hideyuki Ikuhara, Akira Usui, Hiroyuki Nagai, Tetsuo Kutsuki | 1989-05-30 |
| 4817195 | Channel selection apparatus having automatic frequency compensation for transmission frequency error | Akira Usui, Minoru Miyata, Hideyuki Ikuhara, Hiroyuki Nagai, Tadashi Yamada | 1989-03-28 |
| 4797638 | Oscillator including a transistor used both as constant current source and amplifier | Akira Usui, Hiroyuki Nagai | 1989-01-10 |