Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6661315 | Resonator, filter, oscillator, duplexer, and communication apparatus | — | 2003-12-09 |
| 6556107 | Dielectric resonator, inductor, capacitor, dielectric filter, oscillator, and communication device | Yohei Ishikawa, Hiroaki Tanaka, Yutaka Ida | 2003-04-29 |
| 6535089 | High-frequency circuit device and communication apparatus using the same | — | 2003-03-18 |
| 6515554 | High-frequency circuit device and communication apparatus | Yohei Ishikawa, Takatoshi Kato, Koichi Sakamoto | 2003-02-04 |
| 6504456 | Communication device having a spurious wave blocking circuit formed of a plural fundamental pattern | Yohei Ishikawa | 2003-01-07 |