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经营范围
发明名称
ELECTRONIC EXCHANGE
摘要
申请公布号
JPH01109859(A)
申请公布日期
1989.04.26
申请号
JP19870266963
申请日期
1987.10.22
申请人
NIPPON TELEGR & TELEPH CORP <NTT>;TOSHIBA CORP
发明人
SAITO TAKAFUMI;ITO TAKAHARU;ONO KIYOSHI
分类号
H04M3/22;H04Q1/20;H04Q3/545
主分类号
H04M3/22
代理机构
代理人
主权项
地址
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