Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6590475 | Filter, antenna duplexer, and communication apparatus incorporating the same | Yasuo Yamada, Kikuo Tsunoda, Hirofumi Miyamoto, Hajime Suemasa | 2003-07-08 |
| 6545565 | Filter, antenna sharing device, and communication device | — | 2003-04-08 |
| 6522220 | Frequency variable filter, antenna duplexer, and communication apparatus incorporating the same | Yasuo Yamada, Kikuo Tsunoda, Hirofumi Miyamoto, Hajime Suemasa | 2003-02-18 |