Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8306496 | Channel characteristic analyzing apparatus and method | Hirokazu Sawada | 2012-11-06 |
| 8149758 | Wireless communication system | — | 2012-04-03 |
| 7872609 | Circular waveguide antenna and circular waveguide array antenna | Hok Huor Ou, Seiji Nishi, Hiroyo Ogawa, Kiyoshi Hamaguchi | 2011-01-18 |
| 7869668 | Method for generating carrier residual signal and its device | Yoshihiro Hashimoto, Kaoru Higuma, Junichiro Ichikawa, Shingo Mori, Hiroyo Ogawa | 2011-01-11 |
| 7804883 | Method and system for frequency hopping radio communication | Hiroyo Ogawa | 2010-09-28 |
| 7697574 | Radio communication apparatus, transmitter apparatus and receiver apparatus | Eiji Suematsu, Hiroyo Ogawa, Kiyoshi Hamaguchi | 2010-04-13 |
| 7697846 | Method for changing frequency and base station in radio optical fusion communication system | Hiroyo Ogawa, Yoshihiro Hashimoto | 2010-04-13 |
| 7599672 | Millimeter-wave-band radio communication method in which both a modulated signal and an unmodulated carrier are transmitted to a system with a receiver having plural receiving circuits | Kiyoshi Hamaguchi, Hiroyo Ogawa | 2009-10-06 |
| 7302236 | Radio communication method and system for performing communication among a plurality of radio communication terminals | Kiyoshi Hamaguchi, Hiroyo Ogawa | 2007-11-27 |
| 7292831 | Radio communicate method and system | Kiyoshi Hamaguchi, Hiroyuki Tsuji, Hiroyo Ogawa | 2007-11-06 |
| 7280824 | Wireless communication system | Hiroyo Ogawa | 2007-10-09 |
| 7251461 | Wireless communications system, wireless transmitter, and wireless receiver | Kiyoshi Hamaguchi, Hiroyo Ogawa | 2007-07-31 |
| 7043201 | Two-way radio communication system and two-way radio communication method | Kiyoshi Hamaguchi, Hiroyo Ogawa | 2006-05-09 |
| 6826234 | Radio communication apparatus and radio communication method | Kiyoshi Hamaguchi, Hiroyo Ogawa | 2004-11-30 |