Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5969560 | Switching circuit at high frequency with low insertion loss | Kazumasa Kohama | 1999-10-19 |
| 5930245 | Radio telephone apparatus for performing space diversity reception to communicate with base stations in a TDMA radio communication system | Seijiro Ishizuka | 1999-07-27 |
| 5825227 | Switching circuit at high frequency with low insertion loss | Kazumasa Kohama | 1998-10-20 |
| 5822684 | Antenna switching circuit and wireless communication system | — | 1998-10-13 |
| 5731964 | Electromagnetic-wave shielding device | Takeshi Sugiyama | 1998-03-24 |
| 5634200 | Antenna duplexer and transmitting/receiving apparatus using the same | Ryuji Oki, Shinichi Hirota, Sachio Iida | 1997-05-27 |
| 5276914 | Dual-mode transceiver that switches out a large insertion loss filter during transmission | Seijiro Ishizuka | 1994-01-04 |
| 5262741 | Attenuator for high-frequency signal | — | 1993-11-16 |