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经营范围
发明名称
SUBSCRIBER LINE LOOP MONITOR SYSTEM
摘要
申请公布号
JPH03165197(A)
申请公布日期
1991.07.17
申请号
JP19890304227
申请日期
1989.11.22
申请人
FUJITSU LTD;NIPPON TELEGR & TELEPH CORP <NTT>
发明人
SATO MASAFUSA;SHINKAWA HIROSHI;ISHIZAWA AKIRA
分类号
H04Q3/42;H04Q3/72
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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