Issued Patents All Time
Showing 51–75 of 86 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6933780 | Predistortion circuit and power amplifier | Seiji Fujiwara, Toru Matsuura, Makoto Sakakura | 2005-08-23 |
| 6847258 | Power amplifier, power amplifying method and radio communication apparatus | Toshimitsu Matsuyoshi, Masayuki Miyaji | 2005-01-25 |
| 6833758 | Power amplifier | Toshimitsu Matsuyoshi, Seiji Fujiwara | 2004-12-21 |
| 6813317 | Multicarrier transmitting method and multicarrier transmitter circuit | Shin'ichi Kugou | 2004-11-02 |
| 6803837 | Power splitter/combiner circuit, high power amplifier and balun circuit | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2004-10-12 |
| 6791409 | Feedforward amplifier and feedforward amplification method | Naoki Takachi, Rie Takeuchi | 2004-09-14 |
| 6750706 | Control method and circuit for feedforward distortion compensation amplifier | Toshimitsu Matsuyoshi, Naoki Takachi, Yuji Saito | 2004-06-15 |
| 6734727 | Feedforward amplifier, feedforward amplification method | Naoki Takachi, Yuji Saito | 2004-05-11 |
| 6720829 | Distortion-compensated amplifying circuit | Toshimitsu Matsuyoshi, Seiji Fujiwara | 2004-04-13 |
| 6710652 | Feedforward amplifier | Masayuki Miyaji, Toshimitsu Matsuyoshi, Seiji Fujiwara | 2004-03-23 |
| 6690249 | Power splitter/combiner multi-layer circuit | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2004-02-10 |
| 6590906 | Multi-carrier transmitter circuit and communication equipment | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2003-07-08 |
| 6590449 | Predistortion circuit, low-distortion power amplifier, and control methods therefor | Toru Matsuura, Makoto Sakakura, Seiji Fujiwara | 2003-07-08 |
| 6563395 | Power splitter/combiner circuit, high power amplifier and balun circuit | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2003-05-13 |
| 6545542 | Power amplifier with coupler for cross-coupling amplifiers for reduction of differential frequency component | Toshimitsu Matsuyoshi, Masayuki Miyaji, Seiji Fujiwara | 2003-04-08 |
| 6542021 | High frequency switch and communication apparatus with a high frequency voltage divider | Hiroshi Isono | 2003-04-01 |
| 6507253 | Delay circuit and feedforward amplifier | Toshimitsu Matsuyoshi, Toru Matsuura, Seiji Fujiwara | 2003-01-14 |
| 6421530 | Radio circuit having a local oscillator frequency which differs from the transmit frequency or the receive frequency and mobile radio apparatus | Hisashi Adachi, Hiroaki Kosugi, Hiroshi Haruki, Junichi Yasuno, Kazuhiko Ikeda | 2002-07-16 |
| 6329875 | Power amplifier, power control method for power amplifier, and communication equipment | Toshio Obara, Hiroaki Kosugi, Naoki Komatsu | 2001-12-11 |
| 6326845 | Feedforward amplifier | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2001-12-04 |
| 6300848 | Power splitter and power combiner using N-branch-line-shaped directional couplers | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2001-10-09 |
| 6206557 | Traffic sign with vertically movable light source | Noritoshi Sakuma, Kyohei Marukawa, Takao Suzuki | 2001-03-27 |
| 6201439 | Power splitter/ combiner circuit, high power amplifier and balun circuit | Masayuki Miyaji, Hiroaki Kosugi, Shin'ichi Kugou | 2001-03-13 |
| 6169461 | High-frequency oscillating circuit | Toshiaki Andoh, Makoto Sakakura, Takeshi Miura, Hiroaki Kosugi | 2001-01-02 |
| 6147571 | Dual-band multilayer bandpass filter | Shoichi Kitazawa, Toru Yamada, Toshio Ishizaki, Koichi Ogawa, Makoto Fujikawa +2 more | 2000-11-14 |