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经营范围
发明名称
Automatic telephone systems
摘要
申请公布号
US2890284(A)
申请公布日期
1959.06.09
申请号
US19550549804
申请日期
1955.11.29
申请人
SIEMENS EDISON SWAN LIMITED
发明人
FLOOD JOHN EDWARD
分类号
H04Q11/04
主分类号
H04Q11/04
代理机构
代理人
主权项
地址
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