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发明名称
Signaling system
摘要
申请公布号
US1896767(A)
申请公布日期
1933.02.07
申请号
US19310547689
申请日期
1931.06.29
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BUCKLEY OLIVER E.
分类号
H01F27/42
主分类号
H01F27/42
代理机构
代理人
主权项
地址
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