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经营范围
发明名称
Repeatered transmission system
摘要
申请公布号
US2258275(A)
申请公布日期
1941.10.07
申请号
US19400350478
申请日期
1940.08.03
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BLACK HAROLD S.
分类号
H04B3/04
主分类号
H04B3/04
代理机构
代理人
主权项
地址
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