Issued Patents All Time
Showing 26–50 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291160 | Filter arrangement including a non-reversible circuit element, a band-pass filter, and an active circuit | Jun Hattori, Toshio Nishikawa | 1994-03-01 |
| 5235294 | Auto-tuned apparatus for band-pass filter | Hidekazu Wada, Sadao Yamashita, Hiroyuki Kubo | 1993-08-10 |
| 5229729 | Radio frequency signal combining/sorting apparatus | Toshio Nishikawa, Koichi Takehara | 1993-07-20 |
| 5184096 | Parallel connection multi-stage band-pass filter comprising resonators with impedance matching means capacitively coupled to input and output terminals | Kikuo Wakino, Toshio Hishikawa, Koichi Takehara, Toru Tanizaki | 1993-02-02 |
| 5159294 | Non-reciprocal circuit element | Takekazu Okada, Keiji Okamura, Takashi Kawanami | 1992-10-27 |
| 5132651 | Filter apparatus | Jun Hattori, Toshio Nishikawa | 1992-07-21 |
| 5119034 | Method of measuring dielectric material constants and measuring device employed therefor | Hidekazu Wada, Jun Hattori, Hiroyuki Kubo, Taiyo Nishiyama | 1992-06-02 |
| 5097236 | Parallel connection multi-stage band-pass filter | Kikuo Wakino, Toshio Nishikawa, Koichi Takehara, Toru Tanizaki | 1992-03-17 |
| 5049842 | Dielectric resonator having a cutout portion for receiving an unitary tuning element conforming to the cutout shape | Hidekazu Wada, Kouichi Takehara, Toru Tanizaki, Shigeji Arakawa, Shinichi Kunioka | 1991-09-17 |
| 4996506 | Band elimination filter and dielectric resonator therefor | Toshiro Hiratsuka, Hirotsugu Abe, Hisashi Takagaki, Sadao Yamashita | 1991-02-26 |
| 4942377 | Rod type dielectric resonating device with coupling plates | Kikuo Tsunoda, Toshiro Hiratsuka, Hirotsugu Abe | 1990-07-17 |
| 4916417 | Microstripline filter | Jun Hattori, Hideyuki Kato | 1990-04-10 |
| 4902991 | Radio frequency signal combining/sorting device | Hidekazu Wada, Koichi Takehara, Shigeji Arakawa, Toru Tanizaki | 1990-02-20 |
| 4839773 | Dielectric filter | Kikuo Tsunoda, Toshiro Hiratsuka, Hirotsugu Abe | 1989-06-13 |
| 4821006 | Dielectric resonator apparatus | Kikuo Tsunoda, Toshiro Hiratsuka, Hirotsugu Abe | 1989-04-11 |
| 4816788 | High frequency band-pass filter | Hiroaki Tanaka | 1989-03-28 |
| 4740765 | Dielectric filter | Sadao Yamashita, Kikuo Tsunoda, Toshiro Hiratsuka, Kazuyoshi Miyawaki | 1988-04-26 |
| 4733208 | Dielectric filter having impedance changing means coupling adjacent resonators | Kikuo Tsunoda, Toshiro Hiratsuka | 1988-03-22 |
| 4728913 | Dielectric resonator | Hidekazu Wada, Kouichi Takehara | 1988-03-01 |
| 4727342 | Dielectric resonator | Jun Hattori | 1988-02-23 |
| 4721931 | Stripline filter | Toshio Nishikawa, Jun Hattori, Hideyuki Kato | 1988-01-26 |
| 4706052 | Dielectric resonator | Jun Hattori | 1987-11-10 |
| 4692727 | Dielectric resonator device | Kikuo Wakino, Hiroshi Tamura | 1987-09-08 |
| 4639699 | Dielectric resonator comprising a resonant dielectric pillar mounted in a conductively coated dielectric case | Toshio Nishikawa, Hidekazu Wada | 1987-01-27 |
| 4636759 | Electrical trap construction | Tadahiro Yorita, Sadao Yamashita | 1987-01-13 |