Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6831904 | Cluster structured mobile communication system base station, cluster control station, line control station and mobile station | Hirohito Suda, Narumi Umeda | 2004-12-14 |
| 6785552 | Location managing method for managing location of mobile station in mobile wireless packet communication system and mobile wireless packet communication system | Takuya Shinozaki, Narumi Umeda | 2004-08-31 |
| 6760588 | Method and apparatus for stabilizing communication in mobile communication system | Ichiro Okajima, Narumi Umeda, Yoshifumi Suzuki | 2004-07-06 |