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发明名称
Gramophone record
摘要
申请公布号
US2619440(A)
申请公布日期
1952.11.25
申请号
US19470734552
申请日期
1947.03.13
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
LORD WILLIAM EDWARD
分类号
G11B3/70
主分类号
G11B3/70
代理机构
代理人
主权项
地址
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