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发明名称
Anordning ved elektromagnetiske Lyddaaser til Grammofoner og lignende.
摘要
申请公布号
DK43632(C)
申请公布日期
1931.01.26
申请号
DKD43632
申请日期
1929.05.23
申请人
THE ELECTRAMONIC COMPANY LIMITED;INGENIOERER DONOVAN WILLIAM SAYERS;LEONARD NOEL TYRRELL;SYDNEY JAMES TYRRELL
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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