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经营范围
发明名称
PRIVATE EXCHANGE DEVICE
摘要
申请公布号
JPH03244267(A)
申请公布日期
1991.10.31
申请号
JP19900039638
申请日期
1990.02.22
申请人
CANON INC
发明人
SAKURAI SHIGEKI
分类号
H04N1/00
主分类号
H04N1/00
代理机构
代理人
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