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发明名称
Light signal
摘要
申请公布号
US1887983(A)
申请公布日期
1932.11.15
申请号
US19300465084
申请日期
1930.07.01
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
WELLS WESLEY B.
分类号
B60Q1/26
主分类号
B60Q1/26
代理机构
代理人
主权项
地址
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