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发明名称
Automatic telephone systems
摘要
申请公布号
US2763723(A)
申请公布日期
1956.09.18
申请号
US19530399966
申请日期
1953.12.23
申请人
SIEMENS BROTHERS & CO. LIMITED
发明人
WARMAN BLOOMFIELD JAMES
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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