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经营范围
发明名称
Duplex transmission system
摘要
申请公布号
US1962026(A)
申请公布日期
1934.06.05
申请号
US19300422275
申请日期
1930.01.21
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
MAYER HANS;FENYO LADISLAUS
分类号
H04B1/46;H04B3/21
主分类号
H04B1/46
代理机构
代理人
主权项
地址
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