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发明名称
Selecting system
摘要
申请公布号
US2303356(A)
申请公布日期
1942.12.01
申请号
US19410424866
申请日期
1941.12.30
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HOLDEN WILLIAM H. T.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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