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发明名称
TELEPHONE EXCHANGE SYSTEM
摘要
申请公布号
JPH0413344(A)
申请公布日期
1992.01.17
申请号
JP19900115511
申请日期
1990.05.01
申请人
CANON INC
发明人
TAKASHIMA SHOICHI
分类号
H04M3/42;H04M3/00;H04Q3/58
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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