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发明名称
Verfahren und Einrichtung zur magnetischen Schallaufzeichnung und -wiedergabe
摘要
申请公布号
DE663413(C)
申请公布日期
1938.08.05
申请号
DE1932A067561D
申请日期
1932.10.30
申请人
ALLGEMEINE ELEKTRICITAETS-GESELLSCHAFT
发明人
DIPL.-ING. RICHARD KELLER
分类号
G11B5/00
主分类号
G11B5/00
代理机构
代理人
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