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发明名称
Signaling system
摘要
申请公布号
US2255595(A)
申请公布日期
1941.09.09
申请号
US19390258547
申请日期
1939.02.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BONORDEN ALLEN R.
分类号
H04L12/18
主分类号
H04L12/18
代理机构
代理人
主权项
地址
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