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发明名称
CODED TRACK CIRCUIT FOR RAILWAY TRAFFIC CONTROL
摘要
申请公布号
CA412640(A)
申请公布日期
1943.05.18
申请号
CAD412640
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
HOWARD A. THOMPSON
分类号
主分类号
代理机构
代理人
主权项
地址
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