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发明名称
Selective control and indication system
摘要
申请公布号
US2400257(A)
申请公布日期
1946.05.14
申请号
US19420446399
申请日期
1942.06.09
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
MILLER ALFRED B.
分类号
H04Q9/10
主分类号
H04Q9/10
代理机构
代理人
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地址
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