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发明名称
Selecting and lockout circuit
摘要
申请公布号
US2609454(A)
申请公布日期
1952.09.02
申请号
US19480035851
申请日期
1948.06.29
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HECHT GEORGE
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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