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经营范围
发明名称
Communicating system
摘要
申请公布号
US2115914(A)
申请公布日期
1938.05.03
申请号
US19340730127
申请日期
1934.06.11
申请人
发明人
分类号
H04W52/02
主分类号
H04W52/02
代理机构
代理人
主权项
地址
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