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发明名称
Switching system
摘要
申请公布号
US2039640(A)
申请公布日期
1936.05.05
申请号
US19350032318
申请日期
1935.07.20
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FERGUSON JAMES G.
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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