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经营范围
发明名称
TELEPHONE EXCHANGE
摘要
申请公布号
JPH03127548(A)
申请公布日期
1991.05.30
申请号
JP19890266959
申请日期
1989.10.12
申请人
CANON INC
发明人
OTSUKA KUNIAKI
分类号
H04N1/32;H04M3/00;H04M11/00;H04M11/02
主分类号
H04N1/32
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代理人
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