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发明名称
PRIVATE EXCHANGE
摘要
申请公布号
JPH04124961(A)
申请公布日期
1992.04.24
申请号
JP19900243766
申请日期
1990.09.17
申请人
CANON INC
发明人
SAKURAI SHIGEKI
分类号
H04N1/00;H04Q3/58
主分类号
H04N1/00
代理机构
代理人
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