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发明名称
Signaling system
摘要
申请公布号
US2678409(A)
申请公布日期
1954.05.11
申请号
US19500182468
申请日期
1950.08.31
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HOLDEN WILLIAM H. T.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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