Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6563383 | Variable gain circuit | Osamu Watanabe | 2003-05-13 |
| 6477360 | Frequency converter | Osamu Watanabe, Takafumi Yamaji, Hiroshi Tanimoto | 2002-11-05 |
| 6339711 | Radio apparatus | Hiroshi Tsurumi, Hiroshi Yoshida, Syuichi Sekine, Hiroyuki Kayano, Tadahiko Maeda | 2002-01-15 |
| 6249249 | Active array antenna system | Shuichi Obayashi, Takafumi Yamaji, Hiroki Shoki, Yasushi Murakami | 2001-06-19 |
| 6215989 | Variable gain circuit | — | 2001-04-10 |
| 6148181 | Radio apparatus adapted to remove image components from local oscillating signals | — | 2000-11-14 |
| 6100731 | Frequency multiplier | — | 2000-08-08 |
| 5995819 | Frequency converter and radio receiver using same | Takafumi Yamaji, Osamu Watanabe, Hiroshi Tanimoto, Tetsuro Itakura, Ryuichi Fujimoto | 1999-11-30 |
| 5872475 | Variable attenuator | — | 1999-02-16 |
| 5796286 | Attenuation circuitry using gate current control of FET conduction to vary attenuation | — | 1998-08-18 |
| 5742189 | Frequency conversion circuit and radio communication apparatus with the same | Hiroshi Yoshida, Miyuki Ogura, Koji Iino | 1998-04-21 |
| 5736840 | Phase shifter and communication system using the phase shifter | Hiroshi Tanimoto | 1998-04-07 |
| 5650714 | Orthogonal signal generation system | Hiroshi Tanimoto | 1997-07-22 |
| 5418475 | Input/output circuit having the input buffer circuit being connected in parallel with two transistors with the same polarity | — | 1995-05-23 |