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发明名称
Signaling system
摘要
申请公布号
US2302071(A)
申请公布日期
1942.11.17
申请号
US19410389836
申请日期
1941.04.23
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
TAYLOR EDMUND R.
分类号
H04Q1/444
主分类号
H04Q1/444
代理机构
代理人
主权项
地址
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