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发明名称
Circuit arrangement for supervising the terminal equipment belonging to a junction line extending between two telephone exchanges
摘要
申请公布号
US3398243(A)
申请公布日期
1968.08.20
申请号
US19650483258
申请日期
1965.08.27
申请人
TELEFONAKTIEBOLAGET L M ERICSSON
发明人
EDSTROM NILS HERBERT
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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