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发明名称
Improvements in optical devices for reproducing sound from film records
摘要
申请公布号
GB354876(A)
申请公布日期
1931.08.20
申请号
GB19300015880
申请日期
1930.05.23
申请人
CLAUDE DAVID BUSSARD;GILBERT LANE
发明人
分类号
G11B7/00
主分类号
G11B7/00
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