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发明名称
TELEPHONE CONFERENCE SYSTEM IN INTEGRATED SERVICE DIGITAL NETWORK
摘要
申请公布号
JPH0344148(A)
申请公布日期
1991.02.26
申请号
JP19890179344
申请日期
1989.07.11
申请人
NEC ENG LTD
发明人
KANEKO YUKIYOSHI
分类号
H04M1/00;H04M1/253
主分类号
H04M1/00
代理机构
代理人
主权项
地址
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