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发明名称
Perfectionnements aux plaques luminescentes et spécialement à leurs applications pour la signalisation
摘要
申请公布号
FR48037(E)
申请公布日期
1937.10.16
申请号
FRD48037
申请日期
1936.04.29
申请人
LE CIMENT SIGNAL
发明人
分类号
G09F13/16
主分类号
G09F13/16
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代理人
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