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经营范围
发明名称
Combined barricade and flashing signal light
摘要
申请公布号
US3015804(A)
申请公布日期
1962.01.02
申请号
US19610110745
申请日期
1961.05.17
申请人
NORTHERN SIGNAL COMPANY, INC.
发明人
NUNN EWING D.
分类号
E01F13/02;G08B5/38;G09F13/16
主分类号
E01F13/02
代理机构
代理人
主权项
地址
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