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发明名称
Telegraph alarm circuit
摘要
申请公布号
US2275126(A)
申请公布日期
1942.03.03
申请号
US19400317809
申请日期
1940.02.08
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BONORDEN ALLEN R.
分类号
H04L12/24;H04L12/26
主分类号
H04L12/24
代理机构
代理人
主权项
地址
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