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发明名称
Two-way signal transmission system
摘要
申请公布号
US2328951(A)
申请公布日期
1943.09.07
申请号
US19420451357
申请日期
1942.07.17
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BRYANT NEWTON W.
分类号
H04B3/20;H04M9/08
主分类号
H04B3/20
代理机构
代理人
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地址
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