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发明名称
Closed User Group (CUG) servers and a CUG control database for push-to-talk (PTT) radio communications
摘要
申请公布号
GB2418573(A)
申请公布日期
2006.03.29
申请号
GB20050023441
申请日期
2004.10.04
申请人
NEC CORPORATION
发明人
NAOKI HASEGAWA
分类号
H04W4/08
主分类号
H04W4/08
代理机构
代理人
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地址
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