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发明名称
Transmission system
摘要
申请公布号
US2301223(A)
申请公布日期
1942.11.10
申请号
US19410393196
申请日期
1941.05.13
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MITCHELL DOREN
分类号
H04J3/17;H04J3/24
主分类号
H04J3/17
代理机构
代理人
主权项
地址
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