Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5229729 | Radio frequency signal combining/sorting apparatus | Toshio Nishikawa, Youhei Ishikawa | 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, Youhei Ishikawa, Toru Tanizaki | 1993-02-02 |
| 5097236 | Parallel connection multi-stage band-pass filter | Kikuo Wakino, Toshio Nishikawa, Youhei Ishikawa, Toru Tanizaki | 1992-03-17 |
| 4902991 | Radio frequency signal combining/sorting device | Youhei Ishikawa, Hidekazu Wada, Shigeji Arakawa, Toru Tanizaki | 1990-02-20 |
| 4623857 | Dielectric resonator device | Toshio Nishikawa, Youhei Ishikawa, Hidekazu Wada | 1986-11-18 |