Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7330708 | Tuning circuit with amplitude attenuation function and integrated circuit for radio communication apparatus | Masahiro Umewaka, Hiroya Yamamoto, Keitarou Sekine, Akira Hyougo | 2008-02-12 |
| 7171178 | Tuning circuit having amplitude-varying function | Masahiro Umewaka, Hiroya Yamamoto, Keitaro Sekine, Akira Hyogo | 2007-01-30 |