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经营范围
发明名称
CHANNEL SWITCHING SYSTEM DURING COMMUNICATION
摘要
申请公布号
JPH0287728(A)
申请公布日期
1990.03.28
申请号
JP19880238690
申请日期
1988.09.26
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
MARUYAMA YASUO;SUZUKI SHIGEFUSA;FUNEKAWA KIMITOSHI
分类号
H04B7/26
主分类号
H04B7/26
代理机构
代理人
主权项
地址
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