Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6331808 | Dielectric resonator device | Shigeyuki Mikami, Tomiya Sonoda | 2001-12-18 |
| 6249195 | Dielectric filter, dielectric duplexer, and transceiver having circular and polygonal electrode openings | Shigeyuki Mikami, Tomiya Sonoda, Kiyoshi Kanagawa | 2001-06-19 |
| 6236291 | Dielectric filter, duplexer, and communication device | Tomiya Sonoda, Kiyoshi Kanagawa | 2001-05-22 |
| 6232854 | Dielectric resonator device, dielectric filter, oscillator, sharing device, and electronic apparatus | Shigeyuki Mikami, Tomiya Sonoda, Yutaka Ida, Kiyoshi Kanagawa | 2001-05-15 |
| 6201456 | Dielectric filter, dielectric duplexer, and communication device, with non-electrode coupling parts | Tomiya Sonoda, Kenichi Iio | 2001-03-13 |
| 6184758 | Dielectric resonator formed by polygonal openings in a dielectric substrate, and a filter, duplexer, and communication apparatus using same | Yohei Ishikawa, Tomiya Sonoda, Shigeyuki Mikami, Yutaka Ida, Kiyoshi Kanagawa | 2001-02-06 |
| 6177854 | Dielectric resonator device | Shigeyuki Mikami, Tomiya Sonoda | 2001-01-23 |
| 6147575 | Dielectric filter transmission-reception sharing unit and communication device | Tomiya Sonoda, Kenichii Iio | 2000-11-14 |
| 6121855 | Dielectric filter comprising at least one coupling member coupled to two coupling modes of a resonator and a communication device using the same | Tomiya Sonoda, Shigeyuki Mikami, Kenichi Iio | 2000-09-19 |
| 6104261 | Dielectric resonator having a resonance region and a cavity adjacent to the resonance region, and a dielectric filter, duplexer and communication device utilizing the dielectric resonator | Tomiya Sonoda, Yutaka Ida, Shigeyuki Mikami, Kiyoshi Kanagawa | 2000-08-15 |
| 6069543 | Dielectric resonator capable of varying resonant frequency | Yohei Ishikawa, Sadao Yamashita, Kenichi Iio | 2000-05-30 |
| 6057745 | Dielectric filter, transmitting/receiving duplexer, and communication apparatus having depressed parallel plate mode below a resonant frequency | Tomiya Sonoda, Yutaka Ida, Shigeyuki Mikami, Kiyoshi Kanagawa | 2000-05-02 |
| 5986527 | Planar dielectric line and integrated circuit using the same line | Yohei Ishikawa, Sadao Yamashita, Kenichi Iio | 1999-11-16 |
| 5945894 | Dielectric resonator and filter utilizing a non-radiative dielectric waveguide device | Yohei Ishikawa, Kenichi Iio, Sadao Yamashita | 1999-08-31 |
| 5786740 | Dielectric resonator capable of varying resonant frequency | Yohei Ishikawa, Sadao Yamashita, Kenichi Iio | 1998-07-28 |
| 5764116 | Dielectric resonator and filter utilizing a nonradiative dielectric waveguide device | Yohei Ishikawa, Kenichi Iio, Sadao Yamashita | 1998-06-09 |
| 4996506 | Band elimination filter and dielectric resonator therefor | Youhei Ishikawa, Hirotsugu Abe, Hisashi Takagaki, Sadao Yamashita | 1991-02-26 |
| 4942377 | Rod type dielectric resonating device with coupling plates | Youhei Ishikawa, Kikuo Tsunoda, Hirotsugu Abe | 1990-07-17 |
| 4839773 | Dielectric filter | Youhei Ishikawa, Kikuo Tsunoda, Hirotsugu Abe | 1989-06-13 |
| 4821006 | Dielectric resonator apparatus | Youhei Ishikawa, Kikuo Tsunoda, Hirotsugu Abe | 1989-04-11 |
| 4740765 | Dielectric filter | Youhei Ishikawa, Sadao Yamashita, Kikuo Tsunoda, Kazuyoshi Miyawaki | 1988-04-26 |
| 4733208 | Dielectric filter having impedance changing means coupling adjacent resonators | Youhei Ishikawa, Kikuo Tsunoda | 1988-03-22 |
| 4730174 | Dielectric material coaxial resonator with improved resonance frequency adjusting mechanism | Toshio Nishikawa, Koji Saito | 1988-03-08 |