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发明名称
Perfectionnements apportés aux dispositifs pour l'enregistrement photographique de phonogrammes alternés
摘要
申请公布号
FR811992(A)
申请公布日期
1937.04.27
申请号
FRD811992
申请日期
1936.10.22
申请人
INTERNATIONALE TOBIS MAATSCHAPPIJ N. V.
发明人
JOSEF MAYER,
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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