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经营范围
发明名称
Telephonic concentration arrangements
摘要
申请公布号
GB819753(A)
申请公布日期
1959.09.09
申请号
GB19570006392
申请日期
1957.02.26
申请人
CHARLES MARZIN;MARC CHAPPEY;PIERRE LUCAS
发明人
分类号
H04Q3/52
主分类号
H04Q3/52
代理机构
代理人
主权项
地址
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