Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4713632 | Band reflection type FET dielectric resonator oscillator | Toshio Nishikawa | 1987-12-15 |
| 4694262 | Oscillator with resonator having a switched capacitor for frequency changing | Atsushi Inoue, Yuji Kuroda | 1987-09-15 |
| 4528655 | Apparatus for detecting variation of electrostatic capacitance | Toshio Nishikawa | 1985-07-09 |
| 4464640 | Distribution constant type filter | Toshio Nishikawa, Hiroshi Tamura | 1984-08-07 |
| 4423397 | Dielectric resonator and filter with dielectric resonator | Toshio Nishikawa, Youhei Ishikawa, Yoji Ito | 1983-12-27 |
| 4398164 | Coaxial resonator | Toshio Nishikawa, Youhei Ishikawa, Haruo Matsumoto | 1983-08-09 |
| 4342972 | Microwave device employing coaxial resonator | Toshio Nishikawa, Youhei Ishikawa, Haruo Matsumoto | 1982-08-03 |
| 4325035 | Oscillator using dielectric resonator | Toshio Nishikawa, Yoji Ito, Youhei Ishikawa | 1982-04-13 |
| 4321560 | Oscillator using dielectric resonator | Toshio Nishikawa, Yoji Ito, Youhei Ishikawa | 1982-03-23 |
| 4276525 | Coaxial resonator with projecting terminal portion and electrical filter employing a coaxial resonator of that type | Toshio Nishikawa, Youhei Ishikawa | 1981-06-30 |
| 4245198 | High frequency filter device | Toshio Nishikawa, Youhei Ishikawa, Haruo Matsumoto | 1981-01-13 |
| 4223287 | Electrical filter employing transverse electromagnetic mode coaxial resonators | Toshio Nishikawa, Youhei Ishikawa, Haruo Matsumoto | 1980-09-16 |
| 4200847 | Rectangular branching filter having plurality of rod members for fine impedance matching | Toshio Nishikawa, Yoji Ito, Youhei Ishikawa | 1980-04-29 |
| 4184130 | Filter devices incorporating dielectric resonators and leakage cable | Toshio Nishikawa, Youhei Ishikawa, Yoji Ito | 1980-01-15 |