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发明名称
Dispositifs avertisseurs à inscriptions variables
摘要
申请公布号
FR678386(A)
申请公布日期
1930.03.21
申请号
FRD678386
申请日期
1929.07.13
申请人
发明人
FORTUNE ROBERT OWEN;CROSS PAUL HORRIS
分类号
G03B1/18
主分类号
G03B1/18
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代理人
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