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经营范围
发明名称
Highway sign
摘要
申请公布号
US2359457(A)
申请公布日期
1944.10.03
申请号
US19420458007
申请日期
1942.09.11
申请人
POLAROID CORPORATION
发明人
YOUNG CLINTON J. T.
分类号
G08G1/09
主分类号
G08G1/09
代理机构
代理人
主权项
地址
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