Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |