Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7006847 | Base station for use in multi-network connection communication system and its connecting method | Hijin Sato, Narumi Umeda | 2006-02-28 |
| 6909905 | Mobile communications control including change of bit rate based on traffic and transmit power | Narumi Umeda, Lan Chen | 2005-06-21 |
| 6895216 | Rendering multicast service with sufficient reception quality to wireless terminals | Hijin Sato, Narumi Umeda | 2005-05-17 |
| 6882845 | Autonomous zone forming communication device and autonomous zone forming method | Hijin Sato, Narumi Umeda | 2005-04-19 |
| 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 |
| 6512748 | Radio paging signal coding control scheme using variable number of logical channels according to paging signal traffic | Takayuki Mizuki, Setsuya Ohashi, Shogo Ito | 2003-01-28 |
| 6356579 | Radio paging system | Shogo Ito, Shinzo Ohkubo | 2002-03-12 |
| 6351498 | Robust digital modulation and demodulation scheme for radio communications involving fading | Shogo Ito, Shinzo Ohkubo, Kobaruto Shimada, Fumiyuki Adachi | 2002-02-26 |
| 6301230 | Radio paging system | Shogo Ito, Takayuki Mizuki | 2001-10-09 |
| 5826172 | Mobile communications system for repeatedly transmitting paging signals | Shogo Ito, Shinzo Ohkubo | 1998-10-20 |
| 5805076 | Mobile communications system | Shogo Ito | 1998-09-08 |
| 5794124 | Time diversity communications system | Shogo Ito, Shinzo Ohkubo | 1998-08-11 |
| 5760702 | Receiver with symbol rate sync | Shogo Ito, Shinzo Ohkubo | 1998-06-02 |
| 5722065 | Mobile communications system and mobile receiver | Shogo Ito | 1998-02-24 |
| 5546394 | Message fragmenting in a time diversity radio system | Eric Thomas Eaton, Ronald Hugh Evoy, David J. Hayes, David F. Willard, Shogo Ito | 1996-08-13 |
| 5251330 | Linear transmitter | Kouji Chiba, Toshio Nojima, Shigeru Tomisato, Tadao Takami | 1993-10-05 |
| 5231632 | Radio communication equipment for a mobile station and traffic channel hand-off method using the same | Yoshiaki Tarusawa, Toshio Nojima | 1993-07-27 |
| 5203023 | Phase likelihood comparison diversity receiver | Shigeki Saito | 1993-04-13 |
| 5203024 | Antenna selection diversity reception system | — | 1993-04-13 |
| 4980652 | Frequency synthesizer having compensation for nonlinearities | Yoshiaki Tarusawa, Shigeki Saito, Toshio Nojima | 1990-12-25 |