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发明名称
Automatic line testing and switching circuits
摘要
申请公布号
US2379069(A)
申请公布日期
1945.06.26
申请号
US19430495989
申请日期
1943.07.24
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
DYSART BIRNEY
分类号
H04M3/32;H04M3/40
主分类号
H04M3/32
代理机构
代理人
主权项
地址
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