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经营范围
发明名称
Perfectionnements aux appareils cinématographiques et à leurs compensateurs optiques
摘要
申请公布号
FR724176(A)
申请公布日期
1932.04.22
申请号
FRD724176
申请日期
1931.10.08
申请人
发明人
HERRMANN HELLMUTH
分类号
G03B41/08
主分类号
G03B41/08
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代理人
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