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发明名称
Reflecting sign
摘要
申请公布号
US2142571(A)
申请公布日期
1939.01.03
申请号
US19370171375
申请日期
1937.10.27
申请人
MENKE EDWARD W
发明人
MENKE EDWARD W.
分类号
G09F7/18;G09F13/16
主分类号
G09F7/18
代理机构
代理人
主权项
地址
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