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发明名称
Automatic telephone system
摘要
申请公布号
US2753400(A)
申请公布日期
1956.07.03
申请号
US19520326112
申请日期
1952.12.15
申请人
VINCENT ANDREW W
发明人
VINCENT ANDREW W.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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