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经营范围
发明名称
ELECTRONIC CONFERENCE SYSTEM
摘要
申请公布号
JPH0486028(A)
申请公布日期
1992.03.18
申请号
JP19900199156
申请日期
1990.07.30
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
MASUDA KIYOSHI;NOMURA TOMOYOSHI;SAKAI SHIGENOBU;YOSHIDA AKITERU
分类号
H04N7/15;H04B1/40
主分类号
H04N7/15
代理机构
代理人
主权项
地址
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