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发明名称
Perfectionnements apportés ou relatifs aux dispositifs enregistreurs
摘要
申请公布号
FR935628(A)
申请公布日期
1948.06.24
申请号
FRD935628
申请日期
申请人
HOFGAARD ROLF
发明人
HOFGAARD ROLF
分类号
H04Q1/34
主分类号
H04Q1/34
代理机构
代理人
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地址
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