Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7915971 | Nonreciprocal circuit device | Yukihiro Kitaichi, Takashi Kadooka | 2011-03-29 |
| 6853265 | Dielectric resonator device, dielectric filter, dielectric duplexer, and communication apparatus | Tatsuya Tsujiguchi, Munehisa WATANABE, Yukihiro Kitaichi | 2005-02-08 |
| 6642816 | Strip-line filter, duplexer, filter device, communication device, and method of adjusting characteristic of strip-line filter | Tatsuya Tsujiguchi | 2003-11-04 |
| 6489865 | Strip-line filter, duplexer, filter device, communication device, and method of adjusting characteristic of strip-line filter | Tatsuya Tsujiguchi | 2002-12-03 |
| 6356170 | Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof | Kikuo Tsunoda | 2002-03-12 |
| 6346867 | Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof | Kikuo Tsunoda | 2002-02-12 |
| 6281764 | Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof | Kikuo Tsunoda | 2001-08-28 |
| 6255921 | Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof | Kikuo Tsunoda | 2001-07-03 |
| 6160463 | Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof | Kikuo Tsunoda | 2000-12-12 |
| 6133808 | Dielectric filter having input/output electrodes connected to electrodes on a substrate, and dielectric duplexer incorporating the dielectric filter | — | 2000-10-17 |
| 6020800 | Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof | Kikuo Tsunoda | 2000-02-01 |
| 6002306 | Dielectric filter and dielectric duplexer each having a plurality of dielectric resonators connected in series by a dielectric coupling window | — | 1999-12-14 |
| 6002307 | Dielectric filter and dielectric duplexer | — | 1999-12-14 |
| 5049842 | Dielectric resonator having a cutout portion for receiving an unitary tuning element conforming to the cutout shape | Youhei Ishikawa, Hidekazu Wada, Kouichi Takehara, Toru Tanizaki, Shinichi Kunioka | 1991-09-17 |
| 4902991 | Radio frequency signal combining/sorting device | Youhei Ishikawa, Hidekazu Wada, Koichi Takehara, Toru Tanizaki | 1990-02-20 |