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发明名称
Selecting system
摘要
申请公布号
US2350888(A)
申请公布日期
1944.06.06
申请号
US19410419879
申请日期
1941.11.21
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HALL NATHAN I.
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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