Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7209715 | Power amplifying method, power amplifier, and communication apparatus | — | 2007-04-24 |
| 7046972 | Predistortion linearizer and predistortion distortion compensation method, program, and medium | Kaoru Ishida, Seiji Fujiwara | 2006-05-16 |
| 6980831 | Radio communication base state system including optical advanced base station | Kaoru Ishida, Hisashi Adachi | 2005-12-27 |
| 6972621 | Power amplifier | Kaoru Ishida, Seiji Fujiwara | 2005-12-06 |
| 6940346 | Feedforward amplifier, communication apparatus, feedforward amplification method, program and medium | Masayuki Miyaji, Kaoru Ishida, Hisashi Adachi, Seiji Fujiwara | 2005-09-06 |
| 6847258 | Power amplifier, power amplifying method and radio communication apparatus | Kaoru Ishida, Masayuki Miyaji | 2005-01-25 |
| 6833758 | Power amplifier | Kaoru Ishida, Seiji Fujiwara | 2004-12-21 |
| 6750706 | Control method and circuit for feedforward distortion compensation amplifier | Kaoru Ishida, Naoki Takachi, Yuji Saito | 2004-06-15 |
| 6720829 | Distortion-compensated amplifying circuit | Kaoru Ishida, Seiji Fujiwara | 2004-04-13 |
| 6710652 | Feedforward amplifier | Masayuki Miyaji, Kaoru Ishida, Seiji Fujiwara | 2004-03-23 |
| 6549169 | Antenna for mobile wireless communications and portable-type wireless apparatus using the same | Koichi Ogawa, Hiroshi Iwai | 2003-04-15 |
| 6545542 | Power amplifier with coupler for cross-coupling amplifiers for reduction of differential frequency component | Kaoru Ishida, Masayuki Miyaji, Seiji Fujiwara | 2003-04-08 |
| 6507253 | Delay circuit and feedforward amplifier | Toru Matsuura, Kaoru Ishida, Seiji Fujiwara | 2003-01-14 |
| 6486847 | Monopole antenna | Atsushi Yamamoto, Koichi Ogawa | 2002-11-26 |
| 6320542 | Patch antenna apparatus with improved projection area | Atsushi Yamamoto, Koichi Ogawa | 2001-11-20 |
| 6278415 | Multi-filar helical antenna and portable radio | Koichi Ogawa, Hiroyuki Nakamura, Kenichi Takahashi | 2001-08-21 |
| 6229498 | Helical antenna | Koichi Ogawa, Kenichi Takahashi | 2001-05-08 |
| 6211830 | Radio antenna device | Kenji Monma, Koichi Ogawa, Yoshio Koyanagi | 2001-04-03 |
| 6188366 | Monopole antenna | Atsushi Yamamoto, Koichi Ogawa | 2001-02-13 |
| 6072376 | Filter with low-noise amplifier | Minoru Tachibana, Junichi Yoshizumi, Makoto Sakakura, Toshio Ishizaki, Tomoki Uwano +1 more | 2000-06-06 |