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发明名称
Submarine cable signaling system
摘要
申请公布号
US1921022(A)
申请公布日期
1933.08.08
申请号
US19310553100
申请日期
1931.07.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BURTON EVERETT T.
分类号
H04L25/06
主分类号
H04L25/06
代理机构
代理人
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