Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5644275 | Laminated dielectric resonator and dielectric filter | Toshio Ishizaki | 1997-07-01 |
| 5594394 | Antenna diversity switching device with switching circuits between the receiver terminal and each antenna | Atsushi Sasaki, Toshio Ishizaki, Hiroshi Takahashi, Tooru Sakuragawa, Ikuo Ohta +4 more | 1997-01-14 |
| 5479141 | Laminated dielectric resonator and dielectric filter | Toshio Ishizaki | 1995-12-26 |
| 5442812 | Antenna switching apparatus for selectively connecting antenna to transmitter or receiver | Toshio Ishizaki, Hiroaki Kosugi, Kimio Aizawa, Shogo Iizuka | 1995-08-15 |
| 5196813 | Dielectric filter having a single multilayer substrate | — | 1993-03-23 |