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发明名称
CONFERENCE TELEPHONE SYSTEM
摘要
申请公布号
JPH04196953(A)
申请公布日期
1992.07.16
申请号
JP19900332291
申请日期
1990.11.28
申请人
SANYO ELECTRIC CO LTD
发明人
IMAMURA KAZUMASA
分类号
H04M3/56
主分类号
H04M3/56
代理机构
代理人
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