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发明名称
Perfectionnements se rapportant aux appareils servant à enregistrer et indiquer ou exposer des renseignements
摘要
申请公布号
FR675637(A)
申请公布日期
1930.02.12
申请号
FRD675637
申请日期
1929.05.23
申请人
发明人
HORTON WILLIAM GRAY
分类号
G09F7/06
主分类号
G09F7/06
代理机构
代理人
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