Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5274341 | High-frequency power amplifier | Kenji Sekine, Masami Ohnishi, Nobuo Masuda, Akio Iso | 1993-12-28 |
| 4647869 | Microwave solid-state amplifier | Yoichi Kaneko, Kenji Sekine | 1987-03-03 |