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发明名称
TELEPHONY.
摘要
申请公布号
IE11293(L)
申请公布日期
1930.11.09
申请号
IED11293
申请日期
1929.07.11
申请人
MARCONI'S WIRELESS TELEGRAPH CO., LTD.
发明人
分类号
H04B1/40;H04B3/20;(IPC1-7):H04B1/40
主分类号
H04B1/40
代理机构
代理人
主权项
地址
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