Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6658257 | Radio communication system, frequency allocation method and frequency allocation device | Tomoaki Hirayama, Kiyohito Nagata | 2003-12-02 |
| 6556552 | Signal strength measurement method and device | Hisashi Nakagomi, Akihiro Higashi, Kiyohito Nagata | 2003-04-29 |
| 6507566 | Mobile communication device, mobile data communication method, and recording medium | Chie Noda, Hiroyuki Hattori, Ichiro Okajima | 2003-01-14 |