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经营范围
发明名称
Improvements in photographic processes for combining separately produced sound and picture records
摘要
申请公布号
GB350965(A)
申请公布日期
1931.06.18
申请号
GB19300008677
申请日期
1930.03.18
申请人
BRITISH ACOUSTIC FILMS LIMITED
发明人
分类号
G03C5/14
主分类号
G03C5/14
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