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发明名称
Improvements in or connected with sound reproducing apparatus
摘要
申请公布号
GB363657(A)
申请公布日期
1931.12.21
申请号
GB19300028065
申请日期
1930.09.19
申请人
ASSOCIATED SOUND FILM INDUSTRIES LIMITED
发明人
分类号
G11B33/02
主分类号
G11B33/02
代理机构
代理人
主权项
地址
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